Fix test couch_set_view/test/12-errors.t after merge

Master branch has different view group APIs, so the test needs
to use the master APIs instead of those in the 2.1.1 branch.

Change-Id: I23fb381e6a7ed59c9ac9bbd23298463b07931518
Reviewed-on: http://review.couchbase.org/30137
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: buildbot <build@couchbase.com>
Tested-by: Filipe David Borba Manana <fdmanana@gmail.com>