Add a shim extension availability_zone_filter

Neutron patch: https://review.openstack.org/#/c/566182/

Change-Id: I7121f9249673daa54ae16f8108b8789f9093f83a

neutron_lib/api/definitions/__init__.py

@@ -15,6 +15,7 @@ from neutron_lib.api.definitions import agent
 from neutron_lib.api.definitions import allowedaddresspairs
 from neutron_lib.api.definitions import auto_allocated_topology
 from neutron_lib.api.definitions import availability_zone
+from neutron_lib.api.definitions import availability_zone_filter
 from neutron_lib.api.definitions import bgpvpn
 from neutron_lib.api.definitions import bgpvpn_routes_control
 from neutron_lib.api.definitions import bgpvpn_stdattrs
@@ -97,6 +98,7 @@ _ALL_API_DEFINITIONS = {
     allowedaddresspairs,
     auto_allocated_topology,
     availability_zone,
+    availability_zone_filter,
     bgpvpn,
     bgpvpn_routes_control,
     bgpvpn_stdattrs,

neutron_lib/api/definitions/availability_zone_filter.py

@@ -0,0 +1,29 @@
+#    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.
+
+from neutron_lib.api.definitions import availability_zone as az
+
+
+ALIAS = 'availability_zone_filter'
+IS_SHIM_EXTENSION = True
+IS_STANDARD_ATTR_EXTENSION = False
+NAME = 'Availability Zone Filter Extension'
+DESCRIPTION = 'Add filter parameters to AvailabilityZone resource'
+UPDATED_TIMESTAMP = '2018-06-22T10:00:00-00:00'
+RESOURCE_ATTRIBUTE_MAP = {}
+SUB_RESOURCE_ATTRIBUTE_MAP = {}
+ACTION_MAP = {}
+REQUIRED_EXTENSIONS = [
+    az.ALIAS
+]
+OPTIONAL_EXTENSIONS = []
+ACTION_STATUS = {}

neutron_lib/tests/unit/api/definitions/test_availability_zone_filter.py

@@ -0,0 +1,18 @@
+#    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.
+
+from neutron_lib.api.definitions import availability_zone_filter
+from neutron_lib.tests.unit.api.definitions import base
+
+
+class AvailabilityZoneFilterDefinitionTestCase(base.DefinitionBaseTestCase):
+    extension_module = availability_zone_filter

releasenotes/notes/add-availability_zone_filter-extension-e91e1e5e822e4133.yaml

@@ -0,0 +1,5 @@
+---
+other:
+  - |
+    Add a shim extension ``availability_zone_filter`` to indicate
+    if ``availability_zone`` resource supports filter parameters.