@Override
  public List<String> getAllRoles() throws HiveAuthzPluginException {
    throw new HiveAuthzPluginException("getAllRoles 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