Remove obsolete patterns for date field insertion, add a current one.

Change-Id: Ifb7109b6b3eb210f1b1b40bab236794c07a105d7
Reviewed-on: https://gerrit.libreoffice.org/21943Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Andras Timar <andras.timar@collabora.com>