TestMasterShutdown.testMasterShutdownBeforeStartingAnyRegionServer is flaky

    Thread shutdownThread = new Thread("Shutdown-Thread") {
      @Override
      public void run() {
        LOG.info("Before call to shutdown master");
        try {
          try (Connection connection =
              ConnectionFactory.createConnection(util.getConfiguration())) {
            try (Admin admin = connection.getAdmin()) {
              admin.shutdown();
            }
          }
          LOG.info("After call to shutdown master");
          cluster.waitOnMaster(MASTER_INDEX);
        } catch (Exception e) {
        }
      }
    };