Fix CalDAVCollectionTest.queryPartialCalendar about caldav4j

[TheAntimist]

@ioggstream Been debugging, got down to the root of the problem. Two problems, specifically:

in getCalDAVResources, there's this condition here:

    if (usingCache) {
        query.setCalendarDataProp(null);
        log.debug("Using cache, so I am removing calendar data");
    }

which disables the CalendarData.EXPAND from happening. So, the expand doesn't set, thus, only one VEVENT is returned.

Second thing, is that after expansion in into multiple VEVENTS, you can still have one VCALENDAR, which is what I get in DAViCal. Thus, either you'd need to parse each VEVENT separately as a calendar.

Should I just remove the setCalendarDataProp(null)? or even remove the test?

[ioggstream]

I need some time to investigate the reason of that part. You can skip the test for now but we need to add a set of performance test to check the overhead of removing the setCalendarDataProp (null).

[TheAntimist]

Alright, going ahead with Ignoring it for future reference.

[TheAntimist]

Closing this since, we know the reason, but have no reason to fix.