Teams that want to use Gerrit's submit strategies to handle contention
on busy branches can use %submit to create a change and have it
immediately submitted, if the caller has Submit permission on
refs/for/<ref>. If the merge fails the change stays open.
Change-Id: I98bcefb51ea5363b011e3e57f89f567b73e16103
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>