Merge branch 'remove-satellites' into 'master'

Add migration to remove the contents of the satellites dir

See merge request !1681

config/gitlab.yml.example

@@ -318,10 +318,12 @@ production: &base
   # ==========================
 
   # GitLab Satellites
+  #
+  # Note for maintainers: keep the satellites.path setting until GitLab 9.0 at
+  # least. This setting is fed to 'rm -rf' in
+  # db/migrate/20151023144219_remove_satellites.rb
   satellites:
-    # Relative paths are relative to Rails.root (default: tmp/repo_satellites/)
     path: /home/git/gitlab-satellites/
-    timeout: 30
 
   ## Backup settings
   backup: