D-Net

Added missing iterator

Reuse getTitle method on providers

The activitytype must be taken explicitly by URI prefix on types

Dropped authorization from mapping

The availability type must be taken explicitly by URI prefix on types

Bypassing Query and QueryEngineFactory, otherwise we cannot use the inference rules

Need to use inference rules also in /subjectsWithType method

Type and Ting should not be queried

some logs to INFO

Log when the resource could not be registered in the catalogue and hence we get a blank uuid