CDAP-538: Ported SparkPageRank app to use services instead of procedures.
Merge branch 'develop' of github.com:caskdata/cdap into CDAP-538-spark-page-rank-app
CDAP-538: Added tests for SparkPageRank application.
Merge remote-tracking branch 'upstream/develop' into CDAP-538-spark-page-rank-app
Merge remote-tracking branch 'upstream/develop' into CDAP-538-spark-page-rank-app
CDAP-538: Retrieve data from store by byte key.
Merge remote-tracking branch 'upstream/develop' into CDAP-538-spark-page-rank-app
CDAP-538: Updated SparkPageRank tests according to the google ranks format.
Merge remote-tracking branch 'upstream/develop' into CDAP-538-spark-page-rank-app
CDAP-538: Added services using name with it handlers, without separate service class implementation.
Merge pull request #665 from cybervisiontech/CDAP-538-spark-page-rank-app

 CDAP-538: Ported SparkPageRank app to use Services instead of Procedures; Added unittests.