Spark docs include test and other extra classes

In 1.5.0 there are some extra classes in the Spark docs - including a bunch of test classes. We need to figure out what commit introduced those and fix it. The obvious things like genJavadoc version have not changed.

http://spark.apache.org/docs/1.4.1/api/java/org/apache/spark/streaming/ [before]
http://spark.apache.org/docs/1.5.0/api/java/org/apache/spark/streaming/ [after]