Description of problem:
If there's an error downloading a header for a yum repository, up2date
will attempt to print a translated error, but because it has not
imported the string translation function.  Based on other modules,
adding this to the top should fix it:
  from rhpl.translate import _, N_

Version-Release number of selected component (if applicable):
4.3.69-1

How reproducible:
Always

Steps to Reproduce:
1. Configure up2date to use yum repository
http://fedoraproject.org/pre-extras/3/i386/
2. Attempt to install a package from the repository which requires at
least one other package from the repository.
3. A bogus entry in the header.info file will trigger the error.
  
Actual results:


Expected results:


Additional info: