Support Cluster restart via stc

Itegrate with shutdown.xml and startup.xml for restart ONOS cluster

Change-Id: I0b7cff42fc0f471c5dc6a096963cc5200fc186d7

+<!--
+  ~ Copyright 2015-present Open Networking Laboratory
+  ~
+  ~ 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.
+  -->
+<scenario name="restart" description="ONOS cluster restart">
+    <group name="Restart">
+        <parallel var="${OC#}">
+            <step name="Stop-Service-${#}" exec="onos-service ${OC#} stop"/>
+            <step name="Start-Service-${#}" exec="onos-service ${OC#} start"/>
+            <step name="Wait-for-Start-${#}" exec="onos-wait-for-start ${OC#}"
+                  requires="Start-Service-${#}"/>
+            <step name="Check-Logs-${#}" exec="onos-check-logs ${OC#}"
+                  requires="~Wait-for-Start-${#}"/>
+        </parallel>
+    </group>
+</scenario>