Description of problem:
the jnotify-container element displays error messages with obsolete "alert-error"
class name instead of "alert-danger". This results in transparent notification balloon. (see attached screenshot)


Version-Release number of selected component (if applicable):
6.2.0 snap6.1

How reproducible:
always

Steps to Reproduce:
1. make sure foreman does not have a valid email settings
2. navigate to administer -> users
3. select any user -> email preferences tab
4. click "test email"

Actual results:
transparent error balloon pops out (with non existing "alert-error" class assigned)

Expected results:
the popup uses "alert-danger" class so it is styled properly

Additional info: