CBD-1359:  add 2.5.2, comment out master toy builders

Change-Id: I22ce6ec04044bc6c0489c05a140c98f4ef779e99
Reviewed-on: http://review.couchbase.org/36435
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>