Check add/remove flavor access APIs attributes

This patch adds the JSON schema for Nova V2/V3 add & remove flavor
access APIs response and validate the response with added JSON schema to
block the backward incompatibility change in the future.

The response body of V2 & V3 for add & remove flavor access APIs are same
and given below:

{
    "flavor_access": [
        {
            "flavor_id": "10",
            "tenant_id": "fake_tenant"
        }
}

Partially implements blueprint nova-api-attribute-test

Change-Id: I0e876494b9d1bda418076844ed3211f5513af76c
diff --git a/tempest/api_schema/compute/flavors_access.py b/tempest/api_schema/compute/flavors_access.py
index 152e24c..cd31b0a 100644
--- a/tempest/api_schema/compute/flavors_access.py
+++ b/tempest/api_schema/compute/flavors_access.py
@@ -12,7 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-list_flavor_access = {
+add_remove_list_flavor_access = {
     'status_code': [200],
     'response_body': {
         'type': 'object',
diff --git a/tempest/services/compute/json/flavors_client.py b/tempest/services/compute/json/flavors_client.py
index bc4a64f..3babf4e 100644
--- a/tempest/services/compute/json/flavors_client.py
+++ b/tempest/services/compute/json/flavors_client.py
@@ -128,7 +128,8 @@
         """Gets flavor access information given the flavor id."""
         resp, body = self.get('flavors/%s/os-flavor-access' % flavor_id)
         body = json.loads(body)
-        self.validate_response(schema_access.list_flavor_access, resp, body)
+        self.validate_response(schema_access.add_remove_list_flavor_access,
+                               resp, body)
         return resp, body['flavor_access']
 
     def add_flavor_access(self, flavor_id, tenant_id):
@@ -141,6 +142,8 @@
         post_body = json.dumps(post_body)
         resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
+        self.validate_response(schema_access.add_remove_list_flavor_access,
+                               resp, body)
         return resp, body['flavor_access']
 
     def remove_flavor_access(self, flavor_id, tenant_id):
@@ -153,4 +156,6 @@
         post_body = json.dumps(post_body)
         resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
+        self.validate_response(schema_access.add_remove_list_flavor_access,
+                               resp, body)
         return resp, body['flavor_access']
diff --git a/tempest/services/compute/v3/json/flavors_client.py b/tempest/services/compute/v3/json/flavors_client.py
index 3fdb3ca..1cbbdb2 100644
--- a/tempest/services/compute/v3/json/flavors_client.py
+++ b/tempest/services/compute/v3/json/flavors_client.py
@@ -128,7 +128,8 @@
         """Gets flavor access information given the flavor id."""
         resp, body = self.get('flavors/%s/flavor-access' % flavor_id)
         body = json.loads(body)
-        self.validate_response(schema_access.list_flavor_access, resp, body)
+        self.validate_response(schema_access.add_remove_list_flavor_access,
+                               resp, body)
         return resp, body['flavor_access']
 
     def add_flavor_access(self, flavor_id, tenant_id):
@@ -141,6 +142,8 @@
         post_body = json.dumps(post_body)
         resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
+        self.validate_response(schema_access.add_remove_list_flavor_access,
+                               resp, body)
         return resp, body['flavor_access']
 
     def remove_flavor_access(self, flavor_id, tenant_id):
@@ -153,4 +156,6 @@
         post_body = json.dumps(post_body)
         resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
+        self.validate_response(schema_access.add_remove_list_flavor_access,
+                               resp, body)
         return resp, body['flavor_access']