Description of problem:
There is no output in the response on a DELETE request on activation keys.

root@li-lc-1017:/home/hoiroot# curl -K /opt/hoici/etc/curl-hoici.conf -H 'Content-Type: application/json' -d '{"per_page":9999}' -XDELETE https://localhost/katello/api/v2/activation_keys/31
root@li-lc-1017:/home/hoiroot#


Applying the following patch:

--- activation_keys_controller.rb.old   2014-12-05 10:16:25.718267583 +0000
+++ activation_keys_controller.rb       2014-12-05 10:16:46.512486372 +0000
@@ -77,7 +77,7 @@
     param :id, :identifier, :desc => N_("ID of the activation key"), :required => true
     def destroy
       sync_task(::Actions::Katello::ActivationKey::Destroy, @activation_key)
-      respond :message => _("Deleted activation key '%s'") % params[:id], :status => 204
+      respond_for_destroy
     end

     api :GET, "/activation_keys/:id", N_("Show an activation key")

Makes it consistent with the other parts of the API:

root@li-lc-1017:/home/hoiroot# curl -K /opt/hoici/etc/curl-hoici.conf -H 'Content-Type: application/json' -d '{"per_page":9999}' -XDELETE https://localhost/katello/api/v2/activation_keys/28
{}
root@li-lc-1017:/home/hoiroot#


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:
Consistent responses throughout the API


Additional info: