Do not require immediate password reset if specifying a password

The database seeding routine allows for a password to be set for the root user, but will require that password to be immediately reset on first login.

This diff sets the password expiry time to nil if a password is provided at seed time.
You don't need to initialize `password` and `expire_time` since you are assigning it in the if-else block.
Remove the two lines and I will merge it :)