Use the very new getPrimaryDatabase and getReplicaDatabase.
We skip FilterLookup and CentralDBManager in this patch.
Change-Id: I22c6f8fa60be90599ee177a4ac4a97e1547f79be
This service allows linking the EditFilterMergedContent and
PageSaveComplete hooks for the same edit, so we can update rev IDs in
the abuse_filter_log table. Having such a services also avoids two hacky
static props, and should allow separating the hook handlers easily.
Change-Id: I622d15225ee3af202cb5730a7112652aef8ca71a
