Bug 1109099 - [v2.2] Add test to check that calls are grouped by phone n...

...umber and day

http://jenkins1.qa.scl3.mozilla.com/view/UI/job/flame-kk.ui.adhoc/434/console
Would it be a good idea to set these variables after `self.assertEqual(3, len(group_calls))` and then use them in the next assertions?