@BeforeClass
  public static void setupCluster() throws Exception {
    util = new HBaseTestingUtil();
    util.getConfiguration().set(CoprocessorHost.REGION_COPROCESSOR_CONF_KEY, "");
    util.startMiniCluster(1);
  }
Split the known table in half. (this is hard coded for this test suite)
hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestBulkLoadHFilesSplitRecovery.java