Verify the response attributes of 'list_aggregates'

This patch verifies the response attributes of list_aggregates.
The response body of v2 and v3 API has the same format:

"aggregates": [
    {
        "availability_zone": "nova",
        "created_at": "2012-11-16T06:22:23.361359",
        "deleted": false,
        "deleted_at": null,
        "hosts": [],
        "id": 1,
        "metadata": {
            "availability_zone": "nova"
        },
        "name": "name",
        "updated_at": null
    }
]

Partially implements blueprint nova-api-attribute-test

Change-Id: If4c09929f3e9d3fd743aad2b727a74834fdbf8fd
diff --git a/tempest/api_schema/compute/aggregates.py b/tempest/api_schema/compute/aggregates.py
new file mode 100644
index 0000000..49793fe
--- /dev/null
+++ b/tempest/api_schema/compute/aggregates.py
@@ -0,0 +1,43 @@
+# Copyright 2014 NEC Corporation.  All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+list_aggregates = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'aggregates': {
+                'type': 'array',
+                'items': {
+                    'type': 'object',
+                    'properties': {
+                        'availability_zone': {'type': ['string', 'null']},
+                        'created_at': {'type': 'string'},
+                        'deleted': {'type': 'boolean'},
+                        'deleted_at': {'type': ['string', 'null']},
+                        'hosts': {'type': 'array'},
+                        'id': {'type': 'integer'},
+                        'metadata': {'type': 'object'},
+                        'name': {'type': 'string'},
+                        'updated_at': {'type': ['string', 'null']}
+                    },
+                    'required': ['availability_zone', 'created_at', 'deleted',
+                                 'deleted_at', 'hosts', 'id', 'metadata',
+                                 'name', 'updated_at']
+                }
+            }
+        },
+        'required': ['aggregates']
+    }
+}
diff --git a/tempest/services/compute/json/aggregates_client.py b/tempest/services/compute/json/aggregates_client.py
index 700a29b..ccb85c4 100644
--- a/tempest/services/compute/json/aggregates_client.py
+++ b/tempest/services/compute/json/aggregates_client.py
@@ -15,6 +15,7 @@
 
 import json
 
+from tempest.api_schema.compute import aggregates as schema
 from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
@@ -32,6 +33,7 @@
         """Get aggregate list."""
         resp, body = self.get("os-aggregates")
         body = json.loads(body)
+        self.validate_response(schema.list_aggregates, resp, body)
         return resp, body['aggregates']
 
     def get_aggregate(self, aggregate_id):
diff --git a/tempest/services/compute/v3/json/aggregates_client.py b/tempest/services/compute/v3/json/aggregates_client.py
index fddf5df..7f73622 100644
--- a/tempest/services/compute/v3/json/aggregates_client.py
+++ b/tempest/services/compute/v3/json/aggregates_client.py
@@ -15,6 +15,7 @@
 
 import json
 
+from tempest.api_schema.compute import aggregates as schema
 from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
@@ -32,6 +33,7 @@
         """Get aggregate list."""
         resp, body = self.get("os-aggregates")
         body = json.loads(body)
+        self.validate_response(schema.list_aggregates, resp, body)
         return resp, body['aggregates']
 
     def get_aggregate(self, aggregate_id):