Resolve "Do NOT allow capacity change of a cartridge if there a still files registered on that tape"

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

Make cta-admin --json sq show the mount policy with highest priority and the
mount policy with lowest request age for each queue

New catalogue table and respective cta-admin diskinstance and
cta-admin diskinstancespace commands

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.