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.

Modified initQueue timeout to 30 seconds instead of 5 minutes. The issue is that in case of network issues, such a long timeout may make the diskmanagerd stuck during too long while it is preferable to fail fast.

Modified the clients replier thread to work as a thread pool, with DiskManager/NbClientRepliers from castor.conf being the number of threads

CASTOR-4823: tapeserverd's main process should log statistics and status of the closing session in all cases

Added new messages between the session process and the main process: addition and removal of log parameters.
Added storage of the log parameters in the catalogueTransferSession.
Added logging of the tape session at the end in the initial process, allowing statistics gathering even in
case of crash. This standard log message is intended to be used as an input for the tape log system.
Changed the default off the formatting of doubles in the log so that we don't end up with hard to parse
scientific notation in the logs.