Update subnetwork_project default to null for v6

terraform/slurm_cluster/examples/slurm_cluster/test_cluster/README_TF.md

@@ -87,7 +87,7 @@ No resources.
 | <a name="input_source_image_project"></a> [source\_image\_project](#input\_source\_image\_project) | Project where the source image comes from. If it is not provided, the provider project is used. | `string` | `""` | no |
 | <a name="input_subnets"></a> [subnets](#input\_subnets) | The list of subnets being created. | `list(map(string))` | `[]` | no |
 | <a name="input_subnetwork"></a> [subnetwork](#input\_subnetwork) | Default subnet to deploy to. | `string` | `"default"` | no |
-| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to | `string` | `""` | no |
+| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to | `string` | `null` | no |
 
 ## Outputs
 

terraform/slurm_cluster/examples/slurm_cluster/test_cluster/variables.tf

@@ -56,7 +56,7 @@ variable "subnetwork" {
 variable "subnetwork_project" {
   description = "The project that subnetwork belongs to"
   type        = string
-  default     = ""
+  default     = null
 }
 
 ###########

terraform/slurm_cluster/modules/_instance_template/README_TF.md

@@ -89,7 +89,7 @@ No modules.
 | <a name="input_stack_type"></a> [stack\_type](#input\_stack\_type) | The stack type for this network interface to identify whether the IPv6 feature is enabled or not. Values are `IPV4_IPV6` or `IPV4_ONLY`. Default behavior is equivalent to IPV4\_ONLY. | `string` | `null` | no |
 | <a name="input_startup_script"></a> [startup\_script](#input\_startup\_script) | User startup script to run when instances spin up | `string` | `""` | no |
 | <a name="input_subnetwork"></a> [subnetwork](#input\_subnetwork) | The name of the subnetwork to attach this interface to. The subnetwork must exist in the same region this instance will be created in. Either network or subnetwork must be provided. | `string` | `""` | no |
-| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The ID of the project in which the subnetwork belongs. If it is not provided, the provider project is used. | `string` | `""` | no |
+| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The ID of the project in which the subnetwork belongs. If it is not provided, the provider project is used. | `string` | `null` | no |
 | <a name="input_tags"></a> [tags](#input\_tags) | Network tags, provided as a list | `list(string)` | `[]` | no |
 | <a name="input_threads_per_core"></a> [threads\_per\_core](#input\_threads\_per\_core) | The number of threads per physical core. To disable simultaneous multithreading (SMT) set this to 1. | `number` | `null` | no |
 | <a name="input_total_egress_bandwidth_tier"></a> [total\_egress\_bandwidth\_tier](#input\_total\_egress\_bandwidth\_tier) | Network bandwidth tier. Note: machine\_type must be a supported type. Values are 'TIER\_1' or 'DEFAULT'.<br/>See https://cloud.google.com/compute/docs/networking/configure-vm-with-high-bandwidth-configuration for details. | `string` | `"DEFAULT"` | no |

terraform/slurm_cluster/modules/_instance_template/variables.tf

@@ -200,7 +200,7 @@ variable "subnetwork" {
 variable "subnetwork_project" {
   description = "The ID of the project in which the subnetwork belongs. If it is not provided, the provider project is used."
   type        = string
-  default     = ""
+  default     = null
 }
 
 variable "network_ip" {

terraform/slurm_cluster/modules/_slurm_instance/README_TF.md

@@ -68,7 +68,7 @@ No modules.
 | <a name="input_slurm_instance_role"></a> [slurm\_instance\_role](#input\_slurm\_instance\_role) | Slurm instance type. Must be one of: controller; login; compute. | `string` | `null` | no |
 | <a name="input_static_ips"></a> [static\_ips](#input\_static\_ips) | List of static IPs for VM instances | `list(string)` | `[]` | no |
 | <a name="input_subnetwork"></a> [subnetwork](#input\_subnetwork) | Subnet to deploy to. Only one of network or subnetwork should be specified. | `string` | `""` | no |
-| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to | `string` | `""` | no |
+| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to | `string` | `null` | no |
 | <a name="input_zone"></a> [zone](#input\_zone) | Zone where the instances should be created. If not specified, instances will be spread across available zones in the region. | `string` | `null` | no |
 
 ## Outputs

terraform/slurm_cluster/modules/_slurm_instance/variables.tf

@@ -36,7 +36,7 @@ variable "subnetwork" {
 variable "subnetwork_project" {
   description = "The project that subnetwork belongs to"
   type        = string
-  default     = ""
+  default     = null
 }
 
 variable "hostname" {

terraform/slurm_cluster/modules/slurm_controller_instance/README_TF.md

@@ -63,7 +63,7 @@ limitations under the License.
 | <a name="input_slurm_cluster_name"></a> [slurm\_cluster\_name](#input\_slurm\_cluster\_name) | The cluster name, used for resource naming and slurm accounting. | `string` | n/a | yes |
 | <a name="input_static_ips"></a> [static\_ips](#input\_static\_ips) | List of static IPs for VM instances. | `list(string)` | `[]` | no |
 | <a name="input_subnetwork"></a> [subnetwork](#input\_subnetwork) | Subnet to deploy to. Only one of network or subnetwork should be specified. | `string` | `""` | no |
-| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to. | `string` | `""` | no |
+| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to. | `string` | `null` | no |
 | <a name="input_zone"></a> [zone](#input\_zone) | Zone where the instances should be created. If not specified, instances will be<br/>spread across available zones in the region. | `string` | `null` | no |
 
 ## Outputs

terraform/slurm_cluster/modules/slurm_controller_instance/variables.tf

@@ -38,7 +38,7 @@ variable "subnetwork" {
 variable "subnetwork_project" {
   type        = string
   description = "The project that subnetwork belongs to."
-  default     = ""
+  default     = null
 }
 
 variable "region" {

terraform/slurm_cluster/modules/slurm_login_instance/README_TF.md

@@ -51,7 +51,7 @@ No resources.
 | <a name="input_slurm_cluster_name"></a> [slurm\_cluster\_name](#input\_slurm\_cluster\_name) | Cluster name, used for resource naming. | `string` | n/a | yes |
 | <a name="input_static_ips"></a> [static\_ips](#input\_static\_ips) | List of static IPs for VM instances. | `list(string)` | `[]` | no |
 | <a name="input_subnetwork"></a> [subnetwork](#input\_subnetwork) | Subnet to deploy to. Only one of network or subnetwork should be specified. | `string` | `""` | no |
-| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to. | `string` | `""` | no |
+| <a name="input_subnetwork_project"></a> [subnetwork\_project](#input\_subnetwork\_project) | The project that subnetwork belongs to. | `string` | `null` | no |
 | <a name="input_suffix"></a> [suffix](#input\_suffix) | Login name suffix. | `string` | `"frontend"` | no |
 | <a name="input_zone"></a> [zone](#input\_zone) | Zone where the instances should be created. If not specified, instances will be<br/>spread across available zones in the region. | `string` | `null` | no |
 

terraform/slurm_cluster/modules/slurm_login_instance/variables.tf

@@ -65,7 +65,7 @@ variable "subnetwork" {
 variable "subnetwork_project" {
   type        = string
   description = "The project that subnetwork belongs to."
-  default     = ""
+  default     = null
 }
 
 variable "region" {