Don't pass request into run_process_media

People(tm) want to start run_process_media from the CLI and might not
have a request object handy. So pass in the feed_url into
run_process_media rather than the request object and allow the feed url
to be empty (resulting in no PuSH notification at all then).

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

mediagoblin/plugins/api/views.py

@@ -86,7 +86,10 @@ def post_entry(request):
     #
     # (... don't change entry after this point to avoid race
     # conditions with changes to the document via processing code)
-    run_process_media(entry, request)
+    feed_url = request.urlgen(
+        'mediagoblin.user_pages.atom_feed',
+        qualified=True, user=request.user.username)
+    run_process_media(entry, feed_url)
 
     return json_response(get_entry_serializable(entry, request.urlgen))