Fix an activity stream associate with deleted obj
Fix an activity stream associate with deleted obj

In some scenarios the activity stream associate could be invoked where
obj2 doesn't exist... the .get() will fail and tank the caller
preventing the save.   This guards that and blocks the activity stream
event, saving the save (whew!)

wwitzel3/awx,wwitzel3/awx,wwitzel3/awx,snahelou/awx,snahelou/awx,wwitzel3/awx,snahelou/awx,snahelou/awx