private List<MDCPrivilege> listPrincipalMDCGrants(String principalName,
                                                    PrincipalType principalType, String dcName) {
    return listPrincipalMDCGrants(principalName, principalType, dcName, null);
  }
Add role names of parentRoles and its parents to processedRoles
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java