Fix organizer tests in outlying timezones

Fix test failures resulting from incorrect handling of local and
UTC time, which fail only in timezones some distance from UTC.

Change-Id: I8ddecf501a4db46aca07a1e5d5db7dc5eb804b78
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Reviewed-by: Michael Krasnyk <michael.krasnyk@gmail.com>
Reviewed-by: Christopher Adams <chris.adams@jollamobile.com>