runner: don't drop iscsi connection on lock fence errors
runner: don't drop iscsi connection on lock fence errors

Don't escalate to dropping the iscsi connection if the lock is taken
from us. The initiator is most likely doing it's initialization and so
the lock is bouncing between paths during the device probe stage.

Signed-off-by: Mike Christie <39daeb1549a929782e38aa87c4e3da7f3844b09a@redhat.com>

agrover/tcmu-runner,open-iscsi/tcmu-runner,open-iscsi/tcmu-runner