Previously, BASIC CCur used a custom, single-purpose currency string
parser which did not properly accommodate the user's locale setting.
This change replaces the custom parser with SvNumberFormatter, which
does correctly respect system locale.
Change-Id: I179915eb080e876e5e550dd350fdb86d7fa2bf4c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160848
Tested-by: Jenkins
Reviewed-by: Andreas Heinisch <andreas.heinisch@yahoo.de>