MB-28899 do not check web auth if no web credentials are present
MB-28899 do not check web auth if no web credentials are present

Change-Id: Ic18981a796a6947eba3edc0f6419edada3ed070f
Reviewed-on: http://review.couchbase.org/91843
Well-Formed: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Isha Kandaswamy <e3cc845ebc6144fc4d71cf5f07a0ce9db6fdfa91@couchbase.com>
Tested-by: Johan Larson <5105ed78d79b274eb9b1b31aff9e2d413721d12f@couchbase.com>

couchbase/cbauth,couchbase/cbauth