Please cherry-pick:

Please cherry-pick:
- New feature to allow users on registration entering no password. The
  application will then generate a random password for the user and also sends
  it in clear-text to the EJB (HTTPS is not meant here) so the bean can deliver
  it to the user.
- user registration page will now show proper messages for above feature
- removed obsolete template (seems to be still around?)
- ifBothPasswordsEmptyAllowed() implemented
- added missing i18n strings

Signed-off-by: Roland Häder <roland@mxchange.org>