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.
We could do that, although this is similar behavior to the rest of the scripts currently.

Would it make more sense for the default to be `True`, because we'd only be wanting to prevent the QA views from being synced in production?