Diferents test
Test for demo
Test for the DeepSparkCOntext createHDFSRDD
HDFS Changes
New ExtractorConstans
Merge branch 'feature/hdfs' into develop

Conflicts:
	deep-commons/src/main/java/com/stratio/deep/commons/extractor/utils/ExtractorConstants.java
	deep-core/src/main/java/com/stratio/deep/core/context/DeepSparkContext.java
Merge branch 'develop' of github.com:Stratio/deep-spark into develop