BibCatalog: RT discovery
- In case RT is used as BibCatalog backend, check for its correct installation at module initialization time and gracefully falls-back in case of error.
Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Co-authored-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
BibCatalog: fix missing dummy import