Translates all (leftovers) found using a custom regex, in directories not
shown by /bin/find-german-comments and beginning with "r".

Additionally:
- Translates test strings in /registry/test/testregcpp.cxx

Change-Id: I9fda72a3d1830268c4eb83d67ee7a95e38c31c0d
Reviewed-on: https://gerrit.libreoffice.org/39210Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>