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

Change-Id: I3c620dd89e5761316d31c4163799d41f11936fa5
Reviewed-on: http://review.couchbase.org/36436
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>