identity: in service set command, don't pass the enable option when it is None

Currently, it is passing None value which is not accepted by keystone
parameters validation:

BadRequestException: 400: Client Error for url: ... Invalid input for field 'enabled': None is not of type 'boolean'

Failed validating 'type' in schema['properties']['enabled']:
    {'enum': [True, False, None], 'type': 'boolean'}

On instance['enabled']:
    None

Closes-Bug: #2083021
Change-Id: Ia8772560deb54e71672102157659d4eb22e6ad59

openstackclient/identity/v3/service.py

@@ -225,7 +225,8 @@ class SetService(command.Command):
             kwargs['name'] = parsed_args.name
         if parsed_args.description:
             kwargs['description'] = parsed_args.description
-        kwargs['is_enabled'] = parsed_args.is_enabled
+        if parsed_args.is_enabled is not None:
+            kwargs['is_enabled'] = parsed_args.is_enabled
 
         identity_client.update_service(service.id, **kwargs)
 

openstackclient/tests/unit/identity/v3/test_service.py

@@ -311,7 +311,6 @@ class TestServiceSet(identity_fakes.TestIdentityv3):
         # Set expected values
         kwargs = {
             'type': self.service.type,
-            'is_enabled': None,
         }
         self.identity_sdk_client.update_service.assert_called_with(
             self.service.id, **kwargs
@@ -338,7 +337,6 @@ class TestServiceSet(identity_fakes.TestIdentityv3):
         # Set expected values
         kwargs = {
             'name': self.service.name,
-            'is_enabled': None,
         }
         self.identity_sdk_client.update_service.assert_called_with(
             self.service.id, **kwargs
@@ -365,7 +363,6 @@ class TestServiceSet(identity_fakes.TestIdentityv3):
         # Set expected values
         kwargs = {
             'description': self.service.description,
-            'is_enabled': None,
         }
         self.identity_sdk_client.update_service.assert_called_with(
             self.service.id, **kwargs