Comment 11 for bug 1882804

This morning rubasov gave a really good extra viewpoint for this:
In the 1) case (do placement allocation update for BEFORE_UPDATE event notification)the possibility to have db issue or similar is smaller than the possibility of REST PUT issue towards placement. If the db error (or any issue after PUT allocations) happens that would mean overallocation most possibly and that is a "safer" problem than underallocation from admin perspective.