Updated code so benchmarks actually run.

conf/core-site.xml

conf/slaves

conf/spark-env.sh.template

core/src/main/scala/org/apache/spark/SparkEnv.scala

...in/scala/org/apache/spark/serializer/KryoSerializer.scala

...scala/org/apache/spark/serializer/SerializerManager.scala

graph/src/main/scala/org/apache/spark/graph/Analytics.scala

...n/scala/org/apache/spark/graph/GraphKryoRegistrator.scala

...h/src/main/scala/org/apache/spark/graph/GraphLoader.scala

...rc/main/scala/org/apache/spark/graph/impl/GraphImpl.scala

...n/scala/org/apache/spark/graph/util/GraphGenerators.scala