added authorization for administrative commands and removing security identity parameters from deleters and getters of the catalogue

added to the interfaces the features requested by Vlado: label/lastwrite/lastread logs, encryption key and lbp tag for tapes; and encryption flag for pools

More work on the CLI plus added a new function getarchivefilebyid to the scheduler and the catalogue

from castor in the exercise.

Removed archive and retrieve to directory requests.

Extracted common forward definitions into a single include file.

Enclosed locally used strcutures into anonymous namespaces.

Partial commit to make the status update mechanism work (many many changes), compiles and passes unit tests now

The report packer should now also be referenced in the tape recall thread, so it can report the drive status.
testingMocks/MockRetrieveMount.hpp needs to be improved so it handles les end of session correctly.
Then the mechanism has to be mirrored in Archives (simpler case).

Added url style conversion of checksums
Added support for checksums in mockNs
Fixed support for checksums in the scheduler
Re-instated several ASSERT_NO_THROW which were commented out during debugging.