Bug 449762: nl translation

https://bugs.eclipse.org/bugs/show_bug.cgi?id=449762

- fix quotes in nl
- remove duplicate in nl_BE

Change-Id: I7d347e8fb20543db11828e8f11ece303ba0a976b
Reviewed-on: https://git.eclipse.org/r/35842
Tested-by: Hudson CI
Reviewed-by: Judith Gull <jgu@bsiag.com>