* use GetAll to avoid multiple dbus call. Check slave interface exist
before adding the bridge
* fix forward delay value (should be 30)
* fix typo in vlan-default-pvid
* Check that the slave device exists or exit
* fix typo on vlan setting. Improve getting bridge info
OBS-URL: https://build.opensuse.org/package/show/Virtualization/virt-bridge-setup?expand=0&rev=70
* use typing module
* improve check_interface_exist
* remove run_command, use dbus to check if NM is running
* various fix around dry-run
* fix typo on vlan setting. Improve getting brdige info
* concatenate do_(activate/deactivate/delete) functions
* use external function to get ipv4 config and bridge settings
* various mypy and pylint fixes
OBS-URL: https://build.opensuse.org/package/show/Virtualization/virt-bridge-setup?expand=0&rev=69
