Enabled skipping the Cupv check if the user asking for the privilege is the same as the one running the daemon

Added a the new criteria (less that half the work asked for) for ending the session for migrations.
The symetric for recalls is not possible currently as we do not know the file size beforehand in recalls (it is found out from data on tape).

Renamed runningtransfersset.remove() into kill() and introduced a real remove() method without side effects, that is used in two places

Remove transfers from the runningtransfers set as soon as possible, i.e. when the mover calls close()

Added the possibility of specifying the ceph userId in the ceph library and used it in the CASTOR code

Fixed.

Workaround for bug CASTOR-4829: tapegateway: should request positioning by blockid for recalls instead of fseq.
Added default initialization of the client type to a neutral value. The value needs to be changed to enable the workaround.

Workaround for bug CASTOR-4829: tapegateway: should request positioning by blockid for recalls instead of fseq.
This forces the tape gateways recalls to be positioned by block (which should be the case in practice currently).
This workaround can be removed once the tape gateway version 2.1.15 is deployed.
This workaround is necessary for mixed environement with 2.1.14 tape gateways and 2.1.15 tapeserverd (intended at initial release time).

Fixed missing permanent logging of the TPVID in tape thread: it was wrongly included in a local set and deleted at the end of the local scope.

Added delay to ensure the last reported stats have enough time to get processes by the initial process before the session process exits.

Removed leftovers of special case snprintf call for double, now that snprintf is the default for doubles.