Upgrade failing if your satellite and capsule server having custom certificates installed.

[ganeshpayelkar]

[ERROR 2018-08-16 03:40:47 main] /Stage[main]/Foreman_proxy::Register/Foreman_smartproxy[Satellite-fqdn]: Failed to call refresh: Proxy Satellite-fqdn cannot be refreshed: unknown error (response 500)
[ERROR 2018-08-16 03:40:47 main] /Stage[main]/Foreman_proxy::Register/Foreman_smartproxy[Satellite-fqdn]: Proxy Satellite-fqdn cannot be refreshed: unknown error (response 500)
[ERROR 2018-08-16 03:40:47 main] /usr/share/foreman-installer/modules/foreman/lib/puppet/provider/foreman_smartproxy/rest_v3.rb:44:in refresh_features!' [ERROR 2018-08-16 03:40:47 main] /usr/share/foreman-installer/modules/foreman/lib/puppet/type/foreman_smartproxy.rb:54:in refresh'
[ERROR 2018-08-16 03:40:47 main] /usr/share/ruby/vendor_ruby/puppet/transaction/event_manager.rb:101:in process_callback' [ERROR 2018-08-16 03:40:47 main] /usr/share/ruby/vendor_ruby/puppet/transaction/event_manager.rb:20:in block in process_events'
[ERROR 2018-08-16 03:40:47 main] /usr/share/ruby/vendor_ruby/puppet/transaction/event_manager.rb:93:in `block in queued_events'