Yum raises errors about __init__ and tracer_upload plugin after updating katello-host-tools package to 4.2.3-3 version on RHEL 6 systems

Issue

• After updating katello-host-tools package to 4.2.3-3version, Any yum command execution shows these warnings\error messages.

  # yum repolist
  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, subscription-manager
  This system is registered with an entitlement server, but is not receiving updates. You can use subscription-manager to assign subscriptions.
  repo id                                            repo name                                                                       status
  rhel-6-server-els-rpms                             Red Hat Enterprise Linux 6 Server - Extended Life Cycle Support (RPMs)          21,430
  rhel-6-server-els-satellite-client-6-rpms          Red Hat Satellite Client 6 (for RHEL 6 Server - ELS) (RPMs)                         18
  repolist: 21,448   
  

• How to get the tracer plugin back in a working state?