Merge branch 'dz-add-packages-to-yml' into 'master'

Add packages section to CE config file

See merge request gitlab-org/gitlab-ce!22151

config/gitlab.yml.example

@@ -207,6 +207,10 @@ production: &base
         # endpoint: 'http://127.0.0.1:9000' # default: nil
         # path_style: true # Use 'host/bucket_name/object' instead of 'bucket_name.host/object'
 
+  ## Packages (maven repository so far)
+  packages:
+    enabled: false
+
   ## GitLab Pages
   pages:
     enabled: false