Honor XERROR for get/set cluster configuration (and no-bucket)
Honor XERROR for get/set cluster configuration (and no-bucket)

Don't return no-bucket to clients without xerror support.

Change-Id: Iff23b47926c86753cc5af2108c367f9bcaf816ec
Reviewed-on: http://review.couchbase.org/83804
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine