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
I started this [adhoc job](http://jenkins1.qa.scl3.mozilla.com/view/UI/job/flame-kk.ui.adhoc/440/console) to see if this changes doesn't break the 2 others tests using `phone_number` (`test_a11y_phone_call_log` and `test_call_log_all_calls`).