Add /lib folder to load paths in engine.rb

[stejskalleos]

Missing config.eager_load_paths += Dir["#{config.root}/lib"] in engine.rb can cause NameError (uninitialized constant RedhatAccess::VERSION)

How to reproduce:

• Add gem 'foreman_rh_cloud', path: '/home/vagrant/rh_cloud' to Gemfile
• Register rhel host
• Run insights-client --test-connection on rhel host

It will fail, because of: NameError (uninitialized constant RedhatAccess::VERSION)

cc: @ShimShtein

[ShimShtein]

Indeed in latest foreman the loading mechanism became more strict, so lib folder no longer loads unless added to eager_load_paths