Pass a code JAR to SparkContext in our examples. Fixes SPARK-594.

examples/src/main/java/spark/examples/JavaHdfsLR.java

examples/src/main/java/spark/examples/JavaTC.java

examples/src/main/java/spark/examples/JavaWordCount.java

...in/java/spark/streaming/examples/JavaFlumeEventCount.java

...n/java/spark/streaming/examples/JavaNetworkWordCount.java

...c/main/java/spark/streaming/examples/JavaQueueStream.java

examples/src/main/scala/spark/examples/BroadcastTest.scala

...src/main/scala/spark/examples/ExceptionHandlingTest.scala

examples/src/main/scala/spark/examples/GroupByTest.scala

examples/src/main/scala/spark/examples/HdfsTest.scala

examples/src/main/scala/spark/examples/LocalALS.scala

examples/src/main/scala/spark/examples/LocalKMeans.scala

examples/src/main/scala/spark/examples/LocalLR.scala

examples/src/main/scala/spark/examples/LogQuery.scala

...es/src/main/scala/spark/examples/MultiBroadcastTest.scala

...c/main/scala/spark/examples/SimpleSkewedGroupByTest.scala

...les/src/main/scala/spark/examples/SkewedGroupByTest.scala

examples/src/main/scala/spark/examples/SparkALS.scala

examples/src/main/scala/spark/examples/SparkHdfsLR.scala

examples/src/main/scala/spark/examples/SparkKMeans.scala