2.5.1 release (2.5.1-1083)

Change-Id: Ia93ec29e0f2552627a14026aca43ed54e0135a19
Reviewed-on: http://review.couchbase.org/35008
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>