It was deleted by commit 20830c3c but as soon as
scheduler code shared with frontend we need it.

Add unitName parameter for the logging.

Also replace all drive, Drive, DiskUnit, diskUnit log parameters with
 unitName.

cta.spec.in when we agree on content

Fix output for lpa.

Add mini help printing for all cta commands.

- CTA core dumps for CTA are now available as artifacts

Fixed.

Add logging for the tape VID for potential mounts of retrieve
requests in Scheduler::getNextMount

Regex based on cta::utils::Regex (regexec POSIX regex function)

Examples of usage:
  cta drive up .
  cta drive down ^VDSTK
  cta drive down ..STK.[0-1] -f

if they not set for the cta-objectstore-... commands.

If these parameters are not set the commands will try values from the
/etc/cta/cta-frontend.conf and /etc/cta/cta_catalogue_db.conf