BibUpload: BibCatalog connection

• When BibUpload can't automatically resolve a given revision conflict it is putting the modification in the Holding Pen. At the same time now a ticket is created in BibCatalog to be able to refer to it.

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Tested-by: Tibor Simko <tibor.simko@cern.ch>