Increase the required version to 2.8.10

Change-Id: I0e6d6d71cdacbd3753e1c90956483c745b01e940
Reviewed-on: http://review.couchbase.org/35011
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>