@AfterClass
  public static void tearDownAfterClass() throws Exception {
    UTIL.shutdownMiniCluster();
  }
Make sure that all rpc services for master and region server are properly configured in
{@link SecurityInfo} and {@link HBasePolicyProvider}.
hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestSecurityInfoAndHBasePolicyProviderMatch.java