catalog: Added ACL filtering.
catalog: added deletion methods and tested.

Those are unsafe deletions. They just remove an object, and do not
remove other objects that reference it.
Merge branch 'feature/catalog' of https://github.com/j-coll/opencga into feature/catalog
catalog: ShareFile and ShareProject implemented.
Merge branch 'feature/catalog' of https://github.com/jmmut/opencga into feature/catalog

Conflicts:
	opencga-catalog/opencga-catalog-core/src/main/java/org/opencb/opencga/catalog/core/db/CatalogMongoDBAdaptor.java