@Parameters(name = "{index}: rpcClientImpl={0}")
  public static List<Object[]> params() {
    return Arrays.asList(new Object[] { NettyRpcClient.class },
      new Object[] { BlockingRpcClient.class });
  }
Test secure client connecting to a non secure server, where we have multiple server principal
candidates for a rpc service. See HBASE-28321.
hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestMultipleServerPrincipalsFallbackToSimple.java