Refactor some code into utils/nvmet directory

Author: bmeagherix

src/middlewared/middlewared/etc_files/nvmet_kernel.py

@@ -1,4 +1,4 @@
-from middlewared.plugins.nvmet.kernel import write_config
+from middlewared.utils.nvmet.kernel import write_config
 
 
 def render(service, middleware, render_ctx):

src/middlewared/middlewared/etc_files/nvmet_spdk.py

@@ -1,4 +1,4 @@
-from middlewared.plugins.nvmet.spdk import write_config
+from middlewared.utils.nvmet.spdk import write_config
 
 
 def render(service, middleware, render_ctx):

src/middlewared/middlewared/plugins/nvmet/global.py

@@ -14,7 +14,7 @@
 from middlewared.service import SystemServiceService, ValidationErrors, filterable_api_method, private
 from middlewared.utils import filter_list
 from .constants import NVMET_SERVICE_NAME
-from .kernel import clear_config, load_modules, nvmet_kernel_module_loaded, unload_module
+from middlewared.utils.nvmet.kernel import clear_config, load_modules, nvmet_kernel_module_loaded, unload_module
 from .mixin import NVMetStandbyMixin
 from .utils import uuid_nqn
 

src/middlewared/middlewared/plugins/nvmet/namespace.py

@@ -17,9 +17,9 @@
 from middlewared.service import SharingService, ValidationErrors, private
 from middlewared.service_exception import CallError, MatchNotFound
 from .constants import NAMESPACE_DEVICE_TYPE
-from .kernel import lock_namespace as kernel_lock_namespace
-from .kernel import unlock_namespace as kernel_unlock_namespace
-from .kernel import resize_namespace as kernel_resize_namespace
+from middlewared.utils.nvmet.kernel import lock_namespace as kernel_lock_namespace
+from middlewared.utils.nvmet.kernel import unlock_namespace as kernel_unlock_namespace
+from middlewared.utils.nvmet.kernel import resize_namespace as kernel_resize_namespace
 
 UUID_GENERATE_RETRIES = 10
 NSID_SEARCH_RANGE = 0xFFFF  # This is much less than NSID, but good enough for practical purposes.