Implemented mongoDBAdaptor methods.
Merge branch 'feature/catalog' of https://github.com/j-coll/opencga into feature/catalog
Added mongoDBadaptor getAllStudies.
catalog: Added DBObjectToProjectConverter and DBObjectToStudyConverter
Merge branch 'feature/catalog' of https://github.com/jmmut/opencga into feature/catalog

Conflicts:
	opencga-catalog/opencga-catalog-core/src/test/java/org/opencb/opencga/catalog/core/db/CatalogMongoDBAdaptorTest.java