Description of problem:

When you run a ReX job with ssh user `sshuser` and effective user `effectiveuser`, using method `sudo`, Satellite asks you for effective user password.

Sudo on RHEL actually uses the password of the user invoking sudo, not of the target user, so when you fill password of `effectiveuser`, the call and whole ReX will fail.

How reproducible:

Deterministic

Is this issue a regression from an earlier version:

No

Steps to Reproduce:

1. In ReX wizard, go to tab Advanced fields

Actual behavior: It has a field `Effective user password` with description `Effective user password is only applicable for SSH provider. Other providers ignore this field. Password is stored encrypted in DB until the job finishes. For future or recurring executions, it is removed after the last execution.`

Expected behavior:
When the method is `sudo`, it should ask me for ssh user password, or if behavior differs, describe it correctly.