Bug 12282: fix RESERVESLIP in German sample notices

Accidentally the ISSUESLIP got copied to the RESERVESLIP.
This adds the correct text and formatting to the RESERVESLIP.

To test:
- Run the German web installer on an empty database
- Check that the ISSUESLIP and RESERVESLIP notices are different
  and display correctly

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>

Tested using webinstaller, all optionals, all ok.
ISSUESLIP(Ausleihquittung) longer than RESERVESLIP(Vormerkung)
No errors

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>