added missing url_helpers to activity_creator_spec
added missing url_helpers to activity_creator_spec

yammer/sched.do,YOTOV-LIMITED/sched.do,YOTOV-LIMITED/sched.do,mauricionr/sched.do,yammer/sched.do,mauricionr/sched.do,mauricionr/sched.do,yammer/sched.do,yammer/sched.do,YOTOV-LIMITED/sched.do,mauricionr/sched.do,YOTOV-LIMITED/sched.do