Added check with VMGR that migration requests coming from the gateway imply a BUSY status of the tape in VMGR

Conflicts:
	castor/tape/tapeserver/daemon/TapeDaemon.cpp

Added a mechanism to let know if the MountSession managed to remove the tape from the drive or if it needs to be put down

Fixed in the master branch.

Fixed in the master branch.

Fixed in the master branch.

Before this commit the boolean member Daemon::m_runAsStagerSuperuser was
being set by calling Daemon::runAsStagerSuperuser() and was used by
calling Daemon::daemonizeIfNotRunInForeground().  There was no benefit
gain from this two step approach.  I have therefore effectively moved
the member variable Daemon::m_runAsStagerSuperuser to be a parameter to
daemonizeIfNotRunInForeground().

Conflicts:
	castor/tape/tapeserver/daemon/MountSession.cpp
	castor/tape/tapeserver/daemon/MountSessionAcceptHandler.cpp
	castor/tape/tapeserver/daemon/RecallTaskInjectorTest.cpp

Created fake implementation of libradosstriper and make sure we use it on SLC5 where ceph is not available

To do so, we had to pass the VolumeInfo (which was already a bit propagated before)
and changed by a previous commit

Which were set as the same size as the  mem blocks, and are now hard coded to 256*1024