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

First one was a block not being pushed whe the end of file was reached, the other one was the use a NULL pointer if we fail to position the tape

Which was not making any sense

Now the all are into AutoReleaseBlock.hpp and the class has been templated to take into account the 2 types of MemoryManager