Removed interface classes DiskReadTaskInterface, DiskWriteTaskInterface, DiskThreadPoolInterface

Added missing call to finish for the memory manager in MigrationTaskInjector.
Added missing setting of task injector to the disk read thread pool in MountSession::executeWrite.
Fixed missing setting of m_vid member variable in TapeWriteSingleThread.
Fixed settig of wrong parameteres in castorConf variable in MountSessionGooddayMigration unit test.
Added validation of the migrated files checksums in MountSessionGooddayMigration.

Otherwise, there was a race condition between the control thread and the worker threads.
Now, the log context of the worker thread is passed and used by popAndRequestMore.

in ClientProxy.

This unit test still needs additional checks for completion (currently commented out).

the bytes/files numbers are specified at construction time and thus no longer necessary at the call

The session mode (and client type) is now construction parameter.
We now support migration requests as well.
A new facility records the checkums received in migration notifications.

Got rid of BlockingQueue::tryPop and changed the memory managers destructor to use instead popGetSize

Added a few logs in DiskReadThreadPool ans fixed some log levels into MemManager MigrationTaskInjector and
RecallMemoryManager

Conflicts:
	castor/tape/tapeserver/daemon/MountSession.cpp
	castor/tape/tapeserver/daemon/TapeWriteSingleThread.hpp

In case of global error during migration, all requests (old or new one) for jobs are discarded

when failing to signal the end of an empty session.

It now inherits from the simpler TapeSingleThreadInterface<TapeWriteTaskInterface>
instead of TapeSingleThreadInterface<TapeWriteTask>.

It will allow flushing of potential leftover requests at the end of as session and a controlled thread end.

in order to no even move the little finger if a previous task failed
Also added some comments

Move to a static member function of payload and renamed it zeroAdler32

If a Diskread ou TapeWrite task fails, all others stop and clean memory blocks while the task injector discards all remaining requests