Removed mocking of classes where functions have non-copyable argumentes (unique_ptr).
Replaced NULL references to watchdogs to dummies where necessary.

Fixed 1 last bug that was preventing DataTransferSessionGooddayRecall test to succeed. It now succeeds.

Fixed 4 bugs that are preventing DataTransferSessionGooddayRecall test to succeed. One more left: next commit will do

Completed support for tape density and add usage of at() in a vector access to prevent segfault in unit test.
Removed some throw() specifications which led to segfaults.

Removed requirement that the initial root entry should be unowned as mock over normal file system cannot achieve this.

Simplified redundant code in symetric function for ArchiveMount.

Adjusted unit test to accomodate the new structure (SchedulerDatabase::RetrieveMount is now a pure virtual class).

Implemented cta::ArchiveJob::complete(), and added the members that should be set to have the necessary
information available at complete() time.
Updated the calls in the archive_and_retrieve_new_file unit test.

Please note that this test does not pass because the functionality
being tested has not yet been implemented.

Fixed DataTransferSessionTest. Still needs some tuning to make the last tests meaningful, but we need to have the first ones working first (which will take time).

Added full emulation of a tape session in the archive_and_retrieve_new_file unit test for the scheduler.
Fixed several bugs.

Removed usage of the mock scheduler database that will not be updated for further modification in the scheduler database interface.

Added getting the per tape status in objectstore::TapePool::dumpTapes() (renamed to objectstore::TapePool::dumpTapesAndFetchStatus()).
Implemented the mount selection logic for archives in Scheduler::getNextMount().

The uncommented tests of DataTransferSessionTest now create tape file entries in the archive namespace