Upgrading the Capsule server fails with error "must be present at /usr/share/katello-installer-base/modules/foreman_proxy_content/manifests/init.pp:119 on node capsule.example.com"

Issue

• Upgrading the Capsule server to version 6.3 fails with below error:

  # satellite-installer --scenario capsule --upgrade --foreman-proxy-content-certs-tar capsule.example.com-certs.tar --certs-update-all --certs-regenerate true --certs-deploy true
  /etc/foreman-installer/scenarios.d/capsule.migrations/160314145015-qpid-localhost.rb:2:in `block (2 levels) in load_migrations': undefined method `[]=' for nil:NilClass (NoMethodError)
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/migrations.rb:25:in `instance_eval'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/migrations.rb:25:in `block (2 levels) in load_migrations'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/migration_context.rb:8:in `instance_eval'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/migration_context.rb:8:in `execute'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/migrations.rb:38:in `block in run'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/migrations.rb:35:in `each'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/migrations.rb:35:in `run'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/configuration.rb:274:in `run_migrations'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/kafo_configure.rb:65:in `initialize'
  from /usr/share/gems/gems/clamp-1.0.0/lib/clamp/command.rb:133:in `new'
  from /usr/share/gems/gems/clamp-1.0.0/lib/clamp/command.rb:133:in `run'
  from /usr/share/gems/gems/kafo-2.0.2/lib/kafo/kafo_configure.rb:163:in `run'
  from /usr/sbin/satellite-installer:8:in `<main>'