Migrate to Java 8. TimeDate unmarshalling troubles
Move to LocalDateTime - unmarshalling troubles
Merge remote-tracking branch 'origin/master'

Conflicts:
	CalendarService/src/com/dio/training/calendarservice/service/EventTimeHandlerImpl.java
	CalendarService/test/com/dio/training/calendarservice/datastore/HashMapDataStoreImplTest.java
	CalendarService/test/com/dio/training/calendarservice/event/EventImplBuilderTest.java
	CalendarService/test/com/dio/training/calendarservice/service/EventManagerImplTest.java
	CalendarService/test/com/dio/training/calendarservice/service/EventTimeHandlerImplTest.java
	CalendarService/test/com/dio/training/calendarservice/service/EventValidatorImplTest.java