Add address group exceptions

Add exception classess for address groups

Implements: blueprint address-groups-in-sg-rules
Change-Id: If48947e0dbf0cce47a956e7bbe8eaf3e8f3b6d7f

neutron_lib/exceptions/address_group.py

@@ -0,0 +1,30 @@
+# 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.
+
+from neutron_lib._i18n import _
+from neutron_lib import exceptions
+
+
+class AddressGroupNotFound(exceptions.NotFound):
+    message = _("Address group %(address_group_id)s could not be found.")
+
+
+class AddressesNotFound(exceptions.NotFound):
+    message = _("Addresses %(addresses)s not found in the address group "
+                "%(address_group_id)s.")
+
+
+class AddressesAlreadyExist(exceptions.BadRequest):
+    message = _("Addresses %(addresses)s already exist in the "
+                "address group %(address_group_id)s.")