Use define constant to keep track of all NumberFormat property usage.

Change-Id: I2a544922e03ec8253290ac8bf5a89c9cdd72d8dd
(cherry picked from commit 2538e30ccc2e98de92de5157ca523fdb347eb537)
Reviewed-on: https://gerrit.libreoffice.org/9835
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>