PDIO-249 Support dynamic loading metric setting template
Merge branch 'develop' of github.com:PredictionIO/PredictionIO into develop

Conflicts:
	commons/src/main/scala/io/prediction/commons/settings/OfflineEvalMetricInfos.scala
	commons/src/main/scala/io/prediction/commons/settings/mongodb/MongoOfflineEvalMetricInfos.scala