Moving to CDH4.2.2 and qualifying the build.

We now build spark for CDH4.2.2 and make sure that the artifacts are
qualified with such information.

e.g.

* spark-bagel_2.9.3-0.8.0-h2.0.0-mr1-cdh4.2.2-SNAPSHOT.jar
* spark-core_2.9.3-0.8.0-h2.0.0-mr1-cdh4.2.2-SNAPSHOT.jar
* spark-examples_2.9.3-0.8.0-h2.0.0-mr1-cdh4.2.2-SNAPSHOT.jar
* spark-repl_2.9.3-0.8.0-h2.0.0-mr1-cdh4.2.2-SNAPSHOT.jar
* spark-streaming_2.9.3-0.8.0-h2.0.0-mr1-cdh4.2.2-SNAPSHOT.jar

We also sent a mail to the dev list suggesting such change in trunk.
Waiting for a reply to make the change and submit the pull request.

https://groups.google.com/forum/#!topic/spark-developers/ol7pG2JPHKI
Merge branch 'guavus/master/ci-server' of github.com:Guavus/spark into guavus/master/ci-server