Non Red Hat packages create issues during the upgrade for Red Hat Satellite or Capsule

Issue

• How to check if the Red Hat Satellite Server or Capsule Server has non-Red Hat packages installed?

• While upgrading the Satellite server and the Capsule Server foreman_proxy service is failing.

  /Stage[main]/Foreman_proxy::Service/Service[foreman-proxy]/ensure: change from 'stopped' to 'running' failed: Systemd start for foreman-proxy failed!
  journalctl log for foreman-proxy:
  -- Logs begin at Tue 2020-05-19 14:03:57 EDT, end at Mon 2020-07-06 17:13:17 EDT. --
  Jul XX XX:YY:ZZ satellite.example.com systemd[1]: Starting Foreman Proxy...
  Jul XX XX:YY:ZZ satellite.example.com smart-proxy[6426]: /usr/share/gems/gems/bundler_ext-0.4.1/lib/bundler_ext/output.rb:13:in `strict_err': Gem loading    error: Could not find 'rack' (~> 1.5) among 44 total gem(s) (RuntimeError)
  

• Multiple third-party packages are installed on the Satellite server in which cntlm package is installed from the upstream repository.

  ganglia-3.7.2-33.el7.x86_64 Fedora Project
  nmon-16g-3.el7.x86_64 Fedora Project
  libconfuse-2.7-7.el7.x86_64 Fedora Project
  

• Dependency Issues during the upgrade for the Red Hat Satellite Server.

  --> Finished Dependency Resolution
  Error: Package: libpmem-devel-1.1-1.el7.x86_64 (epel)
         Requires: libpmem = 1.1-1.el7
         Installed: libpmem-1.5.1-2.1.el7.x86_64 (@rhel-7-server-rpms)
             libpmem = 1.5.1-2.1.el7
         Available: libpmem-1.1-1.el7.x86_64 (peel)