@Before
    public void setup() throws Exception {
        super.setup();
        SparkContextStorage.open("local[4]");
        Spark.close();
        HadoopPools.close();
        KryoShimServiceLoader.close();
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
spark-gremlin/src/test/java/org/apache/tinkerpop/gremlin/spark/structure/io/SparkIoRegistryCheck.java