ClientRMService implemented getCallerUgi and verifyUserAccessForRMApp methods but forget to use sometimes, caused audit log missing.

private UserGroupInformation getCallerUgi(ApplicationId applicationId,
      String operation) throws YarnException {
    UserGroupInformation callerUGI;
    try {
      callerUGI = UserGroupInformation.getCurrentUser();
    } catch (IOException ie) {
      LOG.info("Error getting UGI ", ie);
      RMAuditLogger.logFailure("UNKNOWN", operation, "UNKNOWN",
          "ClientRMService", "Error getting UGI", applicationId);
      throw RPCUtil.getRemoteException(ie);
    }
    return callerUGI;
  }

// getApplicationReport
    UserGroupInformation callerUGI;
    try {
      callerUGI = UserGroupInformation.getCurrentUser();
    } catch (IOException ie) {
      LOG.info("Error getting UGI ", ie);
     // a logFailure should be called here. 
     throw RPCUtil.getRemoteException(ie);
    }