shill: fix regression in wifi_integrationtest

commit d1b715b403e17f4ce01ec15877ea1901fc21a885 changed
the way that DBusControl initializes its connection to
d-bus. update wifi_integrationtest accordingly.

BUG=none
TEST=manual

Change-Id: Ie51531ac476cea074be0488d540f38fe933d8b45
Reviewed-on: http://gerrit.chromium.org/gerrit/2173
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: mukesh agrawal <quiche@chromium.org>
1 file changed