Simple repack on CI

Corrected cta-admin af ls command so that it fills the superseded vid and superseded columns in the result

Replaced the map of tape files with a list as the assumption that we have one copy per copyNb is no more valid with repack.

Added a check while mounting a tape for writing : if some tape files located in the writing tape are not superseded by others,
the write session will fail.

Note: The test CatalogueTest.exist_non_superseded_files_after_fseq is supposed to fail.

cta-admin was failing due to incoherent internal data.

This included extracting missing data while popping elements from archive queue.

Conflicts:
	scheduler/SchedulerTest.cpp

- Queueing into the RetrieveQueueToReportToRepackForFailure
- Reporting of the failed RetrieveJobs (add statistics + deletion of the failed sub requests)
Unit test associated : expandRepackRequestFailedRetrieve

These requests are queued in the RetrieveQueueToReportToRepackForFailure
Adapted the Sorter to be able to queue a RetrieveRequest from Repack into a queue identified by the RepackRequest's address

Someone added xrootd in eos-citrine-depend repo which had a priority of 2. Lowering this one as people are messing with it.

repositories.

basically requiring xrootd-4.8-3 and not our 4.9.0 this is an externally
triggered problem. To fix this we can either disable protectbase yum
plugin for all our yum commands, remove the plugin, sed -i
's/protect=1/protect=0/' /etc/yum.repos.d/* in all our containers OR
enable baseprotect on our repos...
I enabled baseprotect on all our repos.