@Override
  protected boolean pruneServiceFilter() {
    return false;
  }
Called to execute this action.  Upon invocation, calls
{@link KerberosServerAction#processIdentities(Map)}
to iterate through the Kerberos identity metadata and call
{@link PrepareDisableKerberosServerAction#processIdentities(Map)}
for each identity to process.

@param requestSharedDataContext a Map to be used a shared data among all ServerActions related
                                to a given request
@return a CommandReport indicating the result of this action
@throws AmbariException
@throws InterruptedException
ambari-server/src/main/java/org/apache/ambari/server/serveraction/kerberos/PrepareDisableKerberosServerAction.java