Description of problem:

Proxy password displayed in cleartext in HTTP proxy field in virt-who configuration page.

How reproducible:

Always.

Is this issue a regression from an earlier version:

Steps to Reproduce:

1. Create a HTTP proxy on the Satellite. Provide a username and password. For example:

   Name: Test
   Url: https://proxy.example.com:8080
   Username: user
   Password: redhat

2. Navigate to the Virt-who configurations page and press Create Config

3. Click on the drop-down on HTTP Proxy field. 

Actual behavior:

The drop-down will list the proxy with cleartext password 

https://user:redhat@proxy.example.com

Expected behavior:

Password should not be visible in the drop-down. It would be better to list the available proxy names rather than the URLs with password.