Do gitolite calls async. Remove satellite with project remove

Procfile

app/contexts/projects/create_context.rb

app/models/project.rb

app/models/users_project.rb

app/observers/project_observer.rb

app/workers/gitolite_worker.rb

app/workers/post_receive.rb

lib/gitlab/backend/gitolite.rb

lib/gitlab/backend/gitolite_config.rb

lib/gitlab/popen.rb

lib/gitlab/satellite/satellite.rb

lib/tasks/sidekiq.rake