When performing an image installation and the user chooses `vyos` as the default password, a warning is emitted.
The combination vyos/vyos is used in brute force lists and have been seen multiple times in the wild. If a system contains the default dredentials, the MOTD should highlight this to the user.
Also when adding the user `set system login user vyos authentication plaintext-password vyos` a CLI warning should be shown!