CL-526: display user  interest and user searched interests properties side by side if the two are present

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

OO-1946: fire event per type, use the official method to check if we are on the "cluster" node which send the event

OO-1945: better naming of user course environment, use the course environment of the assessed identities to update the score...