[EPIC] As a user, I am given an error if I try to use a url with basic auth
Today in some plugins (e.g. pulp_rpm), having credentials in the url (
https://<username>:<password>@rplevka.fedorapeople.org/fakerepo01/) does not work.
Prevent users from using urls with username/password in them. Instead, direct users that they need to set username/password on the remote instead.