test_calendar: use kill in tearDown as a more robust way to close the test app, PEP-8 cleanups, deprecated method fixes
test_calendar: use kill in tearDown as a more robust way to close the test app, PEP-8 cleanups, deprecated method fixes

drinkertea/pywinauto,cetygamer/pywinauto,pywinauto/pywinauto,vasily-v-ryabov/pywinauto,airelil/pywinauto