Moved disk-operations-related code into the new "disk" directory

Added the creation of the directory corresponding to the vid of the tape to repack (xroot + local file system)

Make was interpreting the variable instead of the underlying shell

Changed the operator "<" of Scheduler::PotentialMount so that the sorting of mounts is in alphabetical order

This reverts commit 5e55c15f.

Conflicts:
	mediachanger/acs/AcsTest.cpp
	mediachanger/acs/CMakeLists.txt
	tests/CMakeLists.txt

It allows running the unit tests in a build environement with:
make -C CTA-build/tests/ -f parallelTestsMakefile.local

Added the manually specified cmake variable named NoAcs.  Please note that this variable currently has no effect when building the CTA rpms

Created initial (incomplete) logging of timings for generic popping from container.

Adapted the in-RPM script generation.

The same variable is now used in all cases.

Added options, suppressions and re-implemented BackendVFS::AsyncLockfreeFetcher to try and make valgrind happy.

Replaced set_target_properties( .. .. INSTALL_RPATH ..) with set_property (TARGET .. APPEND PROPERTY INSTALL_RPATH ..)

Proceed all successful reports asynchronously and periodically check
and clear statuses if they have finished.
In the end of session do the check/flush for all reports in the
successful reports queue.

Switch from synchronous rados remove to async aio_remove in
case of zero size object in BackendRados::AsyncUpdater