MB-8882: do not propose to create view to read-only admin

Because "Create Development View" button is obviously not available
for this user.

Change-Id: I8c5db4929c55b9e89bcea2bc86ac7f771d6dc079
Reviewed-on: http://review.couchbase.org/28397
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>