with that of the archived file

This feature is the result of porting the following CASTOR commit:

    commit 866e31e008b8d8eb5068ad0a887685cd6a1a9eb5
    Author: Steven Murray <steven.murray@cern.ch>
    Date:   Wed Jul 20 11:06:38 2016 +0200

        Replaced select() with poll() in castor::io

The use of select() in the CASTOR tapeserverd daemon prevented the
daemon from working directly with Ceph.  Ceph creates thousands of
concurrent TCP/IP connections which means the "next" file
descriptor to be used for say a new connection from tapeserverd to
rmcd would have a value larger than the maximum value supported by
select().

Fixed the end of session logic for the recall report packer to eliminate the memory leak worked around in the previous commits.

The error logs are now gone.
Adapted the recall report packer unit test.

Re-enabled the unit test, which does not leak memory (but logs errors instead).

Fixed libraby linking which led to multiple initialization of static variable (detected by valgrind's drd).
Worked around cmake's failing dependency management for generated protocol buffer sources (double make in spec file).
Partially fixed the first data transfer session unit test (still disabled).
Fixed a typo in an error message.

Completed changes so that archive and retrieves can be queued, mounts created and jobs reported done.

Added stub for supporting disk instance authorization (to be discussed how to implement this in the catalogue)