ranker: RnkCITATIONDATAData fixture removal

* Removes unused fixture RnkCITATIONDATAData.  (addresses #1905)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
base: database script documentation formatting

* Makes the documentation in scripts/database.py follow PEP257 rules.

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
babel: logger removal

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>