MB-8295: Enable dev views in view merger

Change-Id: Ica55b5d82bb77d1bb694aecfb4049ccbc395b0e7
Reviewed-on: http://review.couchbase.org/26517
Reviewed-by: Filipe David Borba Manana <fdmanana@gmail.com>
Tested-by: buildbot <build@couchbase.com>