MB-9169:  copy branch-master, override-master, exteral-override-master

Change-Id: Ie96eeb21b386de5e290dff98687d3e6a3629d004
Reviewed-on: http://review.couchbase.org/29171
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>