devstack: Add gate_hook for devstack gate job

This gate_hook.sh will be used by project-config.

BTW, fix a seeting mistake for higgins-conductor service.

Change-Id: I55542a1522121b9504f8018ce682be9b874fa941

devstack/gate_hook.sh

@@ -0,0 +1,24 @@
+#!/bin/bash -x
+#
+# 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.
+#
+# This script is executed inside gate_hook function in devstack gate.
+
+
+# Keep all devstack settings here instead of project-config for easy
+# maintain if we want to change devstack config settings in future.
+
+export PROJECTS="openstack/higgins $PROJECTS"
+export DEVSTACK_LOCAL_CONFIG="enable_plugin higgins git://git.openstack.org/openstack/higgins"
+
+$BASE/new/devstack-gate/devstack-vm-gate.sh

devstack/settings

@@ -17,4 +17,4 @@
 
 # Enable Higgins services
 enable_service higgins-api
-enable_service higgins-cond
+enable_service higgins-conductor