NCBC-626: Set defaults on ViewResult to avoid NRE

Change-Id: I7782e4c2363c7b8d125c8bb1d3fd58c274c8f96a
Reviewed-on: http://review.couchbase.org/41633
Tested-by: Jeffry Morris <jeffrymorris@gmail.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Reviewed-by: Brett Lawson <brett19@gmail.com>