Code review comment for lp:~kdub/mir/fix-1563278

Probably a slow test environment - a generous 10s timeout and a test taking 30s to run!

18:51:00 11: [ RUN ] ApplicationNotRespondingDetection.failure_to_pong_is_noticed
18:51:00 11: [2016-04-13 18:50:59.936136] mirserver: Starting
18:51:00 11: [2016-04-13 18:51:00.526634] mirserver: Selected driver: dummy (version 0.22.0)
18:51:02 11: [2016-04-13 18:51:02.694384] mirserver: Using software cursor
18:51:03 11: [2016-04-13 18:51:03.829134] mirserver: Initial display configuration:
18:51:03 11: [2016-04-13 18:51:03.876013] mirserver: 1.1: VGA 0.0" 0x0mm
18:51:03 11: [2016-04-13 18:51:03.894852] mirserver: Current mode 1600x1600 60.00Hz
18:51:03 11: [2016-04-13 18:51:03.897768] mirserver: Preferred mode 1600x1600 60.00Hz
18:51:03 11: [2016-04-13 18:51:03.900158] mirserver: Logical position +0+0
18:51:05 11: [2016-04-13 18:51:05.590816] mirserver: Selected input driver: mir:stub-input (version: 0.22.0)
18:51:05 11: [2016-04-13 18:51:05.932306] mirserver: Mir version 0.22.0
18:51:26 11: /��BUILDDIR��/mir-0.22.0+xenial862bzr3452/tests/acceptance-tests/test_application_not_responding_detection.cpp:115: Failure
18:51:26 11: Value of: marked_as_unresponsive.wait_for(10s)
18:51:26 11: Actual: false
18:51:26 11: Expected: true
18:51:28 11: [2016-04-13 18:51:28.042141] mirserver: Stopping
18:51:30 11: [ FAILED ] ApplicationNotRespondingDetection.failure_to_pong_is_noticed (30224 ms)