Added tool to verify that ONOS server has stopped; added HA cluster restart scenario.

Change-Id: I534eb75003a88c03ec2fe74d29fd56e64ffacc35
diff --git a/tools/test/scenarios/shutdown.xml b/tools/test/scenarios/shutdown.xml
index b52475b..935145e 100644
--- a/tools/test/scenarios/shutdown.xml
+++ b/tools/test/scenarios/shutdown.xml
@@ -17,8 +17,10 @@
     <group name="Shutdown">
         <parallel var="${OC#}">
             <step name="Stop-Service-${#}" exec="onos-service ${OC#} stop"/>
-            <step name="Check-Logs-${#}" exec="onos-check-logs ${OC#}"
+            <step name="Wait-for-Stop-${#}" exec="onos-wait-for-stop ${OC#}"
                   requires="~Stop-Service-${#}"/>
+            <step name="Check-Logs-${#}" exec="onos-check-logs ${OC#}"
+                  requires="~Wait-for-Stop-${#}"/>
         </parallel>
     </group>
 </scenario>