Added instance and event names to 'Cannot process a workflow event for a file in /eos/INSTANCE/proc/' message

the --comment option

Modified cta-admin to allow a user to not specify a comment

not given

cta-admin tape add does not take a capacity anymore

The file will not be queued for archival, but the Frontend will return
SUCCESS to allow zero-length files to be created in the namespace.

the Catalogue

Changes VERSION to VERSION_CMD to avoid name clash with EOS VERSION
macro.

Adapted the cta-admin commands so that we can set the --reason and the
--comment

CLOSEW

address on EOS

Removed diskInstance attiribute from the common::dataStructures::StorageClass class
Adapted unit tests
Adapted cta-admin commands

StorageClass now belongs to a VO (madatory)
Adapted unit tests
Modified cta-admin command to set the VO of a Storage Class

Added UNIQUE constraint on STORAGE_CLASS_NAME and removed the the UNIQUE constraint on DISK_INSTANCE_NAME and STORAGE_CLASS_NAME

cta.archivefile.max_size_gb 1000

Specifies maximum file size that the CTA Frontend will accept to queue
for archival. Defaults to 2 TB and can be configured in in increments
of 1 GB.

This storage class is ignored during CREATE, so that we don't need to
set up an archive route just for testing.

This decouples the "cta-admin tf ls" command from looking up path names
in the catalogue, paving the way to remove the path from the DB.

1. Needs to be sys.* so users can't change it
2. Should not be confused with sys.retrieve.req_id

Renames CTA_ArchiveFileID to sys.archive.file_id
Renames CTA_StorageClass to sys.archive.storage.class