Fixed in the trunk.

The ProcessForker does not yet fork any processes.  This commit
starts to give the ProcessForker some structure.

added the Cleaner Session to unload and dismount cartridges from drives which have been left in dirty state

        but only the wildcard "*" option. For such situations we also add the default
        svcClass which is to be used when the client doesn't specify any particular svcClass

Revert "Fixed typo in python that prevented diskmanagerd to start. Also cleaned up the file for trailing spaces"

This reverts commit 861e5355.

Fixed an 'uncaught exception' error that can happen when a canceled job had been handled by the backfill queue

Refactor the code dedicated to the computation to the first fseq to writte/last fseq written on tape

Renamed the NoReturnValue to ReturnValue and add stuff in it to avoid (not) sending empty frames with zmq

Added the code to read how many files there is on a tape according  to the VMGR in TapeserverProxyZmq::gotWriteMountDetailsFromClient

Added 2 functions in ZmqMsg. One to get the data on read only mode and the other to get the size of the message