Bug 6715 - Fix xmlControlfield.js so the xml files are fetched in the correct languag...

Bug 6715 - Fix xmlControlfield.js so the xml files are fetched in the correct language directory.

xmlControlfield.js was always fetching the "en" xml file, preventing the translations
from working.

http://bugs.koha-community.org/show_bug.cgi?id=6715

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
- Apply patch
- Install language files, example: perl translate install de-DE
- Edit .xml files for value builders 006 and 008
- Test by creating a new record and using value builders

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
(cherry picked from commit 390d1d5be6e59990bee85ed6e44f117a8cd19c54)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>