Description of problem:
Since upgrading my RHEL 6 hosts from

katello-host-tools-fact-plugin.noarch 0:3.5.7-3.el6sat
to
katello-host-tools.noarch 0:4.2.3-3.el6sat

I now get the following every time I do yum commands:

[root@rhel6 ~]# yum clean all
Configuration file /etc/yum/pluginconf.d/_init_.conf not found
Unable to find configuration file for plugin _init_
Configuration file /etc/yum/pluginconf.d/tracer_upload.conf not found
Unable to find configuration file for plugin tracer_upload
Loaded plugins: enabled_repos_upload, package_upload, product-id, search-
: disabled-repos, security, subscription-manager
[...]

Version-Release number of selected component (if applicable):
katello-host-tools-4.2.3-3.el6sat.noarch

How reproducible:
Every yum command

I believe this has broken Tracer for my hosts. Let me know if there's any other information you need.

Note that I have not upgraded my Satellite from 6.12.2 to anything higher (like 6.12.4, or 6.13).