tests: no travis mysql connection limit

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: upstream doi syntax validation change

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: dummy code removal

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>