Have attribute set return some data

Handle html form arrays with blanks, removing blank values
(more complex usage requires JSON)

confluent/httpapi.py

@@ -59,7 +59,8 @@ def _get_query_dict(env, reqbody, reqtype):
             pbody = urlparse.parse_qs(reqbody, True)
             for ky in pbody.iterkeys():
                 if len(pbody[ky]) > 1:  # e.g. REST explorer
-                    qdict[ky] = pbody[ky]
+                    na = [i for i in pbody[ky] if i != '']
+                    qdict[ky] = na
                 else:
                     qdict[ky] = pbody[ky][0]
     if 'restexplorerhonorkey' in qdict:

plugins/configuration/attributes.py

@@ -41,3 +41,4 @@ def update(nodes, element, configmanager, inputdata):
         if updatenode:
             updatedict[node] = updatenode
     configmanager.set_node_attributes(updatedict)
+    return retrieve(nodes, element, configmanager, inputdata)