Not use the deprecated argument

`project` argument is deprecated in keystoneclient for V3 API,
and use `default_project` instead, should use `default_project`
as the argument name in the openstackclient accordingly.

Change-Id: Ib9d70801c933a184afcdab75204393efa764fa87
Closes-Bug: #1462389

openstackclient/identity/v3/user.py

@@ -369,7 +369,7 @@ class SetUser(command.Command):
         if parsed_args.project:
             project_id = utils.find_resource(
                 identity_client.projects, parsed_args.project).id
-            kwargs['project'] = project_id
+            kwargs['default_project'] = project_id
         kwargs['enabled'] = user.enabled
         if parsed_args.enable:
             kwargs['enabled'] = True

openstackclient/tests/identity/v3/test_user.py

@@ -885,7 +885,7 @@ class TestUserSet(TestUser):
         # Set expected values
         kwargs = {
             'enabled': True,
-            'project': identity_fakes.project_id,
+            'default_project': identity_fakes.project_id,
         }
         # UserManager.update(user, name=, domain=, project=, password=,
         #     email=, description=, enabled=, default_project=)