Fix HA tests to match recent ONOS changes

- Minor refactoring to prepare for Upgrade tests
- Fix for change in raft log location
- Fix for auto balancing of leader electors
- Fix for path not found being printed as an exception for intents

Change-Id: I55af0d09c9b3bf74c0f221e7caa6840373a8779d
diff --git a/TestON/tests/HA/HAsanity/HAsanity.params b/TestON/tests/HA/HAsanity/HAsanity.params
index d9e4627..5a9f8f9 100644
--- a/TestON/tests/HA/HAsanity/HAsanity.params
+++ b/TestON/tests/HA/HAsanity/HAsanity.params
@@ -34,7 +34,7 @@
     </ONOS_Configuration>
     <ENV>
         <cellName>HA</cellName>
-        <appString>drivers,openflow,proxyarp,mobility</appString>
+        <appString>events,drivers,openflow,proxyarp,mobility</appString>
     </ENV>
     <GIT>
         <pull>False</pull>