Correctly extract job number; skip setting versions on broken
functional test jobs for now.

Change-Id: If0151d6280ec48fe0e0d96c346ace7c8080e05bd
Reviewed-on: http://review.couchbase.org/42435
Tested-by: Chris Hillery <ceej@couchbase.com>
Reviewed-by: Chris Hillery <ceej@couchbase.com>