AMBARI-12488. RU - Use haadmin failover command instead of killing ZKFC during upgrade/downgrade (alejandro)

ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.2.xml

@@ -76,6 +76,7 @@
       <service-check>false</service-check>
       <service name="HDFS">
         <component>JOURNALNODE</component>
+        <component>ZKFC</component>
         <component>NAMENODE</component>
       </service>