Previously the Klipper repo location can be changed outside of
the lock. If the location of the Klipper path is moved while an autorefresh is occurring it is possible for Moonraker to call refresh
and/or notify_update_refreshed before the repo has been initialized.
This commit moves the re-assignment of the "klipper" updated inside
the lock. In addition AppDeploy._is_valid is now defined in the
__init__() method.
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
6e6388d673