Functional and unit test now are independent.
Functional and unit tests are now indepent.
Merge remote-tracking branch 'origin/feature/functional-tests' into develop

Conflicts:
	deep-aerospike/src/test/java/com/stratio/deep/aerospike/AerospikeCellExtractorFT.java
	deep-core/src/test/java/com/stratio/deep/core/extractor/ExtractorTest.java
Fix
Readded cassandra to parent pom.xml.
Merge branch 'feature/functional-tests' into develop