Added extra debugginh info when a syncfolderitems request runs longer than 5 minutes.

Signed-off-by: Michel <info@1st-setup.nl>
Added extra debug info when a job rusn longer than 5 minutes.

Signed-off-by: Michel <info@1st-setup.nl>
Fixes a bug when updating an existing item. This bug was due to the faxt that the timezones have been migrated to the new xml2json and the updatexml not yet.

Signed-off-by: Michel <info@1st-setup.nl>
Fixed problem offlinecache will get out of sync with online cache.
This happened mostly on declining or removing invitations occurrence.

Signed-off-by: Michel <info@1st-setup.nl>