Removed unused files.
Added missed unittests.

The contents of the Utils.cpp file is a namespace and not a class
therefore the file should start with a lower case letter.

from castor in the exercise.

Renamed CTA/tapeserver/castor to CTA/tapeserver/castor_checkout in preparation for the moving the sub-directory CTA/tapeserver/castor/castor up the directory tree

Fixed.

Fixed.

Fixed h/rfcntl.h which missed multiple inclusion guards entirely.

Patch provided by David Abdurachmanov (CMSSW).

Better implementation of the CastorConfiguration class. No inheritance from map anymore, simpler locks, and proper checks that the lock taking succeed

    castor::common::CastorConfiguration

It would appear that there was two possible design choices, first implement the
class as a map of maps or implement it an object containing a map of a map.
Unfortunately both design choices appear to have been implemented which does
not really work.

This involved moving the definition of basic exceptions to the libcastorcommon and thus adding dependencies to this library in a couple of places that depended only on libcastorclient