EndpointPolicy driver doesn't inherit interface

Added the driver interface 'base.EndpointPolicyDriverV8' as super class
of the sql driver implementation.

Removed unused methods from driver interface and added release notes.

Change-Id: I198dcbda7591e0dafb1da3a72e3f32b258c0e299
Closes-Bug: #1611102

keystone/endpoint_policy/backends/base.py

@@ -114,30 +114,6 @@ class EndpointPolicyDriverV8(object):
         :type policy_id: string
         :returns: List of association dicts
 
-        """
-        raise exception.NotImplemented()  # pragma: no cover
-
-    @abc.abstractmethod
-    def list_endpoints_for_policy(self, policy_id):
-        """List all the endpoints using a given policy.
-
-        :param policy_id: identity of policy that is being associated
-        :type policy_id: string
-        :returns: list of endpoints that have an effective association with
-                  that policy
-
-        """
-        raise exception.NotImplemented()  # pragma: no cover
-
-    @abc.abstractmethod
-    def get_policy_for_endpoint(self, endpoint_id):
-        """Get the appropriate policy for a given endpoint.
-
-        :param endpoint_id: identity of endpoint
-        :type endpoint_id: string
-        :returns: Policy entity for the endpoint
-
-
         """
         raise exception.NotImplemented()  # pragma: no cover
 

keystone/endpoint_policy/backends/sql.py

@@ -17,6 +17,7 @@ import uuid
 import sqlalchemy
 
 from keystone.common import sql
+from keystone.endpoint_policy.backends import base
 from keystone import exception
 
 
@@ -47,7 +48,7 @@ class PolicyAssociation(sql.ModelBase, sql.ModelDictMixin):
         return d
 
 
-class EndpointPolicy(object):
+class EndpointPolicy(base.EndpointPolicyDriverV8):
 
     def create_policy_association(self, policy_id, endpoint_id=None,
                                   service_id=None, region_id=None):

releasenotes/notes/endpoint_policy_driver_unused_methods_removed-e1348cbec9b1110a.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - The  methods ``list_endpoints_for_policy()`` and 
+    ``get_policy_for_endpoint()`` have been removed from the EndpointPolicy
+    driver interface.