+++ This bug was initially created as a clone of Bug #681604 +++

Description of problem:
yum-rhn-plugin will be disabled by upgrade to latest nightly version.

Version-Release number of selected component (if applicable):
yum-rhn-plugin-1.4.3

How reproducible:
Always

Steps to Reproduce:
1. Client system with yum-rhn-plugin from Spacewalk 1.3 Client repository
2. Register the system to Spacewalk
3. Do not touch /etc/yum/pluginconf.d/rhnplugin.conf
4. Make sure the client system communicates properly with its parent:

    # yum repolist

5. Upgrade yum-rhn-plugin to latest nightly version (yum-rhn-plugin-1.4.3
and beyond)
6. See whether the client system communicates properly with its parent:

    # yum repolist
  
Actual results:
Before the upgrade, yum repolist shows repos provided by the parent Spacewalk,
after the package upgrade yum-rhn-plugin is disabled, yum repolist does not
show repos provided by parent Spacewalk.

Expected results:
yum repolist before and after the upgrade show repos provided by parent
Spacewalk, upgrade of yum-rhn-plugin does not disable the plugin if the
client system in question is already registered.

Additional info:
https://bugzilla.redhat.com/show_bug.cgi?id=681604