MB-12274: Add 2.5.2 override manifests

Change-Id: I80862001b4b32400047d3f5fc0ea9e8d3c80548b
Reviewed-on: http://review.couchbase.org/43266
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>