CBQE-927: add upgrade with memcached bucket

Change-Id: I5d992321d8814805982c4768ebd531b1b52a4657
Reviewed-on: http://review.couchbase.org/27272
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>