@Override
  public void revokeRole(List<HivePrincipal> hivePrincipals, List<String> roles, boolean grantOption, HivePrincipal
          grantorPrinc) throws HiveAuthzPluginException, HiveAccessControlException {
    throw new HiveAuthzPluginException("revokeRole not implemented in FallbackHiveAuthorizer");
  }
Change the session context based on configuration to aid in testing of sql
std auth

@param ctx
@param conf
@return
ql/src/java/org/apache/hadoop/hive/ql/security/authorization/plugin/fallback/FallbackHiveAuthorizer.java