If a user decides to to use the lv_vars.yml file then it should fail
silenty so that configuration can be picked up from other places.
Signed-off-by: Andrew Schoen <aschoen@redhat.com>
(cherry picked from commit e43eec57bb44bf5f7a10da8548ca22a8772c2d92) Signed-off-by: Sébastien Han <seb@redhat.com>