OO-1929: added new functions to be able to access the userproperty in expert-mode conditions, added corresponding test and error warning

OO-1926: added formaDateRelative to formatter to add a specific period of time to a baseline date and format it short. made it available in the phantomJS certificates

OO-1873: replace the listing of booking by a native query optimized for our standard setup, replace the .hbm.xml with annotations, add more fetching overall

OO-1853: deduplicates the list of collections for security, remove a possible QuestionItemImpl from the cache for the lock