BibCatalog: add daemon task

• Adds a daemon task for automatic generation of tickets using the BibCatalog API. (fixes #1528)
  • Accepts various arguments for selecting and querying records to create tickets for, for example --recids= or --query=
  • Selection of reportnumbers added by Nikolaos Kalodimas.
  • Implements a plug-in based ticket template system to customize the layout and content of tickets as desired, in addition to functions checking if a record is eligable for ticket creation.
  • List available tickets using --list-tickets.

• Adds the task name 'bibcatalog' to the BibTask accepted task list.

• Adds unit-tests appropriate and example ticket template.

• Adds new admin documentation for the new task.

Co-authored-by: Nikolaos Kalodimas <nikolaos.kalodimas@cern.ch>
Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>

BibCatalog: changes ticket templates

• Changes the function signature required for ticket templates to also pass the BibCatalogTicket object along with the record.

• Removes 'init' from available plugins.

• Updates the documentation and existing templates accordingly.

BibCatalog: surpresses pylint warnings as appropriate