Fix trust create

Current trust create contains unexpected parameter `delegation_depth`
As it could failed current Keystone RBAC validation with error
`jsonschema.exceptions.ValidationError`.

change to `allow_redelegation=False` instead.

Change-Id: If644d3bdaab9124317d5018ceaf40c0b9c47dbdc

Author: ricolin

magnum/common/keystone.py

@@ -211,7 +211,7 @@ def create_trust(self, trustee_user):
                 project=trustor_project_id,
                 trustee_user=trustee_user,
                 impersonation=True,
-                delegation_depth=0,
+                allow_redelegation=False,
                 role_names=roles)
         except Exception:
             LOG.exception('Failed to create trust')

magnum/tests/unit/common/test_keystone.py

@@ -156,7 +156,7 @@ def test_create_trust_with_all_roles(self, mock_session, mock_ks):
         ks_client.create_trust(trustee_user='888888')
 
         mock_ks.return_value.trusts.create.assert_called_once_with(
-            delegation_depth=0,
+            allow_redelegation=False,
             trustor_user='123456', project='654321',
             trustee_user='888888', role_names=['role1', 'role2'],
             impersonation=True)
@@ -173,7 +173,7 @@ def test_create_trust_with_limit_roles(self, mock_session, mock_ks):
         ks_client.create_trust(trustee_user='888888')
 
         mock_ks.return_value.trusts.create.assert_called_once_with(
-            delegation_depth=0,
+            allow_redelegation=False,
             trustor_user='123456', project='654321',
             trustee_user='888888', role_names=['role3'],
             impersonation=True)