Description of problem:

Software update (System->Administration->Software Update) fails with following error.

Traceback (most recent call last):
  File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 3110, in __init__
    self.repos.confirm_func = self._repo_gpg_confirm
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 855, in <lambda>
    repos = property(fget=lambda self: self._getRepos(),
  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 578, in _getRepos
    prerepoconf = self.prerepoconf
AttributeError: 'PackageKitYumBase' object has no attribute 'prerepoconf'



Version-Release number of selected component (if applicable):
yum-utils-1.1.30-1.el6.noarch
yum-plugin-tmprepo-1.1.30-1.el6.noarch
yum-plugin-verify-1.1.30-1.el6.noarch
yum-plugin-changelog-1.1.30-1.el6.noarch
yum-rhn-plugin-0.9.1-10.el6.noarch
yum-metadata-parser-1.1.2-14.1.el6.i686
yum-3.2.29-2.el6.noarch
yum-plugin-downloadonly-1.1.30-1.el6.noarch
yum-plugin-versionlock-1.1.30-1.el6.noarch
yum-plugin-security-1.1.30-1.el6.noarch
yum-plugin-aliases-1.1.30-1.el6.noarch
PackageKit-0.5.8-13.el6.i686

How reproducible:
100%

Steps to Reproduce:
1. Install RHEL6.0
2. Register to rhn
3. Update Software regularly 
  
Actual results:
Cannot update software due to the error

Expected results:
Can update software

Additional info: