DailyTimeIntervalScheduleBuilder.EndingDailyAfterCount(...) doesn't pass validation

**Issue:** trigger built with using of `DailyTimeIntervalScheduleBuilder.EndingDailyAfterCount(...)` won't pass validation as `DailyTimeIntervalTriggerImpl` property `EndTimeOfDay` will be equal to `StartTimeOfDay` which is denied by validation rule.

**Supposed solution:** `DailyTimeIntervalTriggerImpl` has corellated properties `StartTimeUtc` and `EndTimeUtc` which setters check `EndTimeUtc` for being greater or equal to `StartTimeUtc`.  So it looks logically to allow `EndTimeOfDay` to be equal to `StartTimeOfDay` during entire `DailyTimeIntervalTriggerImpl` trigger validation.

Please review.