@Before
  public void setUp() throws Exception {
    utility = new HBaseTestingUtil(conf);
    utility.startMiniCluster(2);
    conn = ConnectionFactory.createConnection(utility.getConfiguration());
    admin = conn.getAdmin();
    String methodName = testName.getMethodName();
    tableName = TableName.valueOf(methodName.substring(0, methodName.length() - 3));
  }
HBASE-19496 noticed that the RegionLoad/ServerLoad may be corrupted if rpc server reuses the
bytebuffer backed, so this test call the Admin#getLastMajorCompactionTimestamp() to invoke
HMaster to iterate all stored server/region loads.
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestServerLoadDurability.java