Fix importing old path for exceptions

The network_ip_availability plugin uses old path for exceptions.
This patch fixes the path and adds negative test for the exception.

Change-Id: I9021f76e21b386f371ff73b926553611ab87fb66
Closes-bug: #1657137

neutron/services/network_ip_availability/plugin.py

@@ -13,7 +13,8 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-import neutron.common.exceptions as exceptions
+from neutron_lib import exceptions
+
 import neutron.db.db_base_plugin_v2 as db_base_plugin_v2
 import neutron.db.network_ip_availability_db as ip_availability_db
 

neutron/tests/tempest/api/test_network_ip_availability_negative.py

@@ -0,0 +1,29 @@
+# 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 oslo_utils import uuidutils
+from tempest.lib import exceptions as lib_exc
+from tempest import test
+
+from neutron.tests.tempest.api import test_network_ip_availability as net_ip
+
+
+class NetworksIpAvailabilityNegativeTest(net_ip.NetworksIpAvailabilityTest):
+
+    @test.attr(type='negative')
+    @test.idempotent_id('3b8693eb-6c57-4ea1-ab84-3730c9ee9c84')
+    def test_network_availability_nonexistent_network_id(self):
+        self.assertRaises(lib_exc.NotFound,
+                          self.admin_client.show_network_ip_availability,
+                          uuidutils.generate_uuid())

neutron/tests/tempest/services/network/json/network_client.py

@@ -87,6 +87,7 @@ class NetworkClientJSON(service_client.RestClient):
             'quotas': 'quotas',
             'qos_policy': 'policies',
             'rbac_policy': 'rbac_policies',
+            'network_ip_availability': 'network_ip_availabilities',
         }
         return resource_plural_map.get(resource_name, resource_name + 's')