Fix CatsConfig and config

Due to [changes in cf-test-helpers](cloudfoundry/cf-test-helpers#92),
we need to update our interface and interface implementation to include
some new methods.

As no one's asking for multiple origin support in CATs, I didn't
actually make it available via the integration_config. That's a trivial
change if we want to add it in the future.

helpers/config/config.go

@@ -41,6 +41,7 @@ type CatsConfig interface {
 	GetAddExistingUserToExistingSpace() bool
 	GetAdminPassword() string
 	GetAdminUser() string
+	GetAdminOrigin() string
 	GetAdminClient() string
 	GetAdminClientSecret() string
 	GetApiEndpoint() string
@@ -58,6 +59,7 @@ type CatsConfig interface {
 	GetUseExistingSpace() bool
 	GetExistingUser() string
 	GetExistingUserPassword() string
+	GetUserOrigin() string
 	GetExistingClient() string
 	GetExistingClientSecret() string
 	GetGoBuildpackName() string

helpers/config/config_struct.go

@@ -853,6 +853,10 @@ func (c *config) GetExistingUserPassword() string {
 	return *c.ExistingUserPassword
 }
 
+func (c *config) GetUserOrigin() string {
+	return ""
+}
+
 func (c *config) GetConfigurableTestPassword() string {
 	return *c.ConfigurableTestPassword
 }
@@ -873,6 +877,10 @@ func (c *config) GetAdminPassword() string {
 	return *c.AdminPassword
 }
 
+func (c *config) GetAdminOrigin() string {
+	return ""
+}
+
 func (c *config) GetApiEndpoint() string {
 	return *c.ApiEndpoint
 }