OPAL-1943: Rmove JDBC and LimeSurvey from data import format chooser when no database of those types exists (JDBC usage must be set to Import also).
OPAL-1943: Import from JDBC database. Show only databases (for limesurvey and JDBC) that are relevant
Merge pull request #292 from emorency/master

OPLA-1943: JDBC import and filter import formats based on available databases