ipsec: T8001: Commit fails removing VTI interface in IPsec config

Fix cases where commit or IPsec up/down hooks fail if the VTI interface
has already been deleted or the `/tmp/ipsec_vti_interfaces` file does not
exist.

Changes:
 - Return empty dict from `get_interface_config()` if it returns None to
   avoid TypeError when accessing 'operstate' (vti_updown_db.py).
 - Use `open_vti_updown_db_for_create_or_update()` in `vti‑up‑down` script so
   the temporary interface tracking file is created automatically when
   missing.

0 files changed, 0 insertions, 0 deletions