adds test to ensure updateSelectedDate is not called if time is invalid
adds test to ensure updateSelectedDate is not called if time is invalid

ingdir/daterangepicker,grahamscott/daterangepicker,ingdir/daterangepicker,grahamscott/daterangepicker,grahamscott/daterangepicker,ingdir/daterangepicker,BrandwatchLtd/daterangepicker,BrandwatchLtd/daterangepicker,BrandwatchLtd/daterangepicker