Update service unit aggregate function to use new service unit location

[Jeff Pihach]

=== modified file 'app/models/models.js'
--- app/models/models.js 2013-08-14 20:30:56 +0000
+++ app/models/models.js 2013-08-16 00:48:00 +0000
@@ -394,12 +394,12 @@
      */
     update_service_unit_aggregates: function(service) {
       var aggregate = this.get_informative_states_for_service(service);
- var sum = Y.Array.reduce(
- Y.Object.values(aggregate), 0, function(a, b) {return a + b;});
+ var units = service.get('units');
+ var sum = units && units.size() || 0;

Simply making this change causes the Google Analytics test to fail because at this point the delta hasn't propagated through to the service so it's units are still 0.

a possible solution:

bcsaller: move the _gaq code into the handlers module and do it on a serviceunitslist after change