INTEG-316 Exception on broadcasting events occurs when manage publication
INTEG-214 [integ-calendar][Migration] Broken Activity Stream due to deleted events

Fix description: Don't show deleted event on activity stream.
Use current SNAPSHOTs for kernel, core, ws, jcr, gatein
Merge branch 'feature/stabilization'
Merge branch 'master' into feature/stabilization
Merge commit '3260399d911f8c0ec39c964b15ae716702f7754c' into HEAD