fix to initialize the default bucket
fix to initialize the default bucket

The last commit moved initialization out of load_engine().
So, the default bucket pathway was incorrectly missing initialization
of the proxied bucket.

Change-Id: I01670d9856b261e855f040a1b37fffb260b2734c
Reviewed-on: http://review.northscale.com:8080/345
Reviewed-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>
Tested-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>

membase/bucket_engine,membase/bucket_engine,couchbase/bucket_engine,couchbase/bucket_engine,couchbase/bucket_engine,couchbase/bucket_engine,membase/bucket_engine,membase/bucket_engine