The lock is now located at `/tmp/resin-supervisor/<appId>/` on the host, and `/tmp/resin/`
on the user container. The old lock location is supported only in Resin OS 1.X (and both locks are
taken in that case).
This fixes the race condition when the app is started before the supervisor, and takes a lock that is
cleared on supervisor startup.
Change-Type: major
Signed-off-by: Pablo Carranza Velez <pablo@resin.io>