osclib/origin: origin_history(): expose source_(project,package,revision).

This is the best location to expose the information as the action context
is already available. Alternatively, a lookup function accepting a request
target_project and target_package could perform the equivalent of the
client-side filter operation that is part of the initial search. This also
alleviates additional queries that would be needed later.

osclib/origin.py

@@ -577,6 +577,9 @@ def origin_history(apiurl, target_project, package, user):
             'origin': annotation.get('origin', 'None'),
             'request': request.reqid,
             'state': request.state.name,
+            'source_project': action.src_project,
+            'source_package': action.src_package,
+            'source_revision': action.src_rev,
         })
 
     return history