Enable/disable building of QA views (refs #7545)

Adds a new configuration option, `CouchDb.SyncQAViews`, read by the sync_couch_views.py script. The `Couch().sync_views()` method now also accepts a `sync_qa_views` argument.
Fixed by f865ebb7d2ea85b610c33dfbbf5ecb8c3abfee2a