New states REPACKING/EXPORTED, new internal states, new maintenance runner for cleaning-up retrieve queue requests

current preflight tests are targetting eos/xrootd regressions

Remove catalogue version 5.0 from CTA and move backwards compatible changes to catalogue version 4.6

Activity Mount Rules associate a Mount Policy to an activity regex.

When recalling a file, the users can specify an activity (i.e. by using
filepath?activity=x). If specified, this activity will be used to select
a matching activity mount rule, if one exists. If more than one Activity
Mount Rule matches the activity, the one with highest retrieve priority
will be chosen.

Acitivity Mount Rules take precedence over Requester Mount Rules.

Remove the looping through the retrieve queue jobs while holding the global lock in OStoreDB::fetchMountInfo.
This was done when a tape was disabled, since we mount disabled tapes if they have pending retrieve requests.
Instead we now mount the tape if the queue object info as in the mount policy map a mount policy whose name
starts with "repack".

With this change, cta-admin now forces repacks added with the --disabledtape to have a mount policy
prefixed with repack (without the --disabledtape flag, the mount policy can have any name)

Also Removed the criteria that a disabled/broken tape is mounted if the queue is filled with deleted
retrieved jobs. Eventually the maxrequestage for the queue will expire, the tape will be mounted
and the queue flushed

- Removed the counting of the readonly tapes as they don't exist
- Count the ACTIVE tapes instead of not disabled ones
- Repack disabled tape system test now undisables the tape after having
  reclaimed it