@BeforeClass
  public static void setUpBeforeClass() throws Exception {
    setUpConfig();

    // Start mini cluster
    // 3 datanodes needed for erasure coding checks
    TEST_UTIL.startMiniCluster(3);
    DistributedFileSystem dfs =
      (DistributedFileSystem) FileSystem.get(TEST_UTIL.getConfiguration());
    dfs.enableErasureCodingPolicy("XOR-2-1-1024k");

    setUpJRubyRuntime();
  }
Returns comma separated list of ruby script names for tests to skip
hbase-shell/src/test/java/org/apache/hadoop/hbase/client/AbstractTestShell.java