[FIX] Collaboration indexing: fixed bug with _deepUnindex 	-This method was looping through the OOBTree while 	possibly removing some of it keys. This could trigger a: 	"RuntimeError: the bucket being iterated changed size" 	exception. 	-Changed it so that it loops on a copy of the keys.
[FIX] Collaboration indexing: fixed bug with _deepUnindex
	-This method was looping through the OOBTree while
	possibly removing some of it keys. This could trigger a:
	"RuntimeError: the bucket being iterated changed size"
	exception.
	-Changed it so that it loops on a copy of the keys.

mic4ael/indico,mic4ael/indico,mvidalgarcia/indico,OmeGak/indico,indico/indico,pferreir/indico,pferreir/indico,indico/indico,OmeGak/indico,mvidalgarcia/indico,indico/indico,ThiefMaster/indico,DirkHoffmann/indico,ThiefMaster/indico,indico/indico,mvidalgarcia/indico,pferreir/indico,mic4ael/indico,ThiefMaster/indico,mic4ael/indico,OmeGak/indico,mvidalgarcia/indico,DirkHoffmann/indico,pferreir/indico,OmeGak/indico,DirkHoffmann/indico,ThiefMaster/indico,DirkHoffmann/indico