fixed bugs
added mongodb WriteConcern
Merge branch 'bugs/0.6' into release/0.6

Conflicts:
	deep-commons/src/main/java/com/stratio/deep/commons/extractor/utils/ExtractorConstants.java
	deep-mongodb/src/main/java/com/stratio/deep/mongodb/config/MongoDeepJobConfig.java
Firts aprox
fixed json test anda cassandra dependecies
Conflicts merge.
Merge branch 'feature/sparksql-integration' into release/0.6

Conflicts:
	deep-core/src/main/java/com/stratio/deep/core/context/DeepSparkContext.java
	deep-core/src/test/java/com/stratio/deep/core/context/DeepSparkContextTest.java
	deep-examples/src/main/java/com/stratio/deep/examples/java/extractorconfig/mongodb/ReadingSQLEntityFromMongoDB.java
Merge branch 'feature/sparksql-integration' into release/0.6

Conflicts:
	deep-core/src/main/java/com/stratio/deep/core/context/DeepSparkContext.java
	deep-core/src/test/java/com/stratio/deep/core/context/DeepSparkContextTest.java
	deep-examples/src/main/java/com/stratio/deep/examples/java/extractorconfig/mongodb/ReadingSQLEntityFromMongoDB.java
Uncommented field.
Merge branch 'develop' of github.com:Stratio/deep-spark into develop
Fix FT error
Merge branch 'develop' of https://github.com/Stratio/deep-spark into develop

Conflicts:
	deep-examples/src/main/java/com/stratio/deep/examples/java/extractorconfig/hdfs/AgregationData.java