Added the ability to support multiple types of machines with
--machine-type added to teuthology-lock when used with --lock-many
or --machine-type with teuthology --lock (automated tests). It
defaults to 'plana' and the 'vps' type is currently unused but
should be in the future.
Signed-off-by: Sandon Van Ness <sandon@van-ness.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
The isolation level is lower than I thought. This made it possible for
two clients to think they both locked the same machines, since the
update would still be modifying each row to change the locked_since
time.
