Bug 11944: Authentication

Bug 11944: Authentication

The password should be encoded before hashing.

Test plan:
- Before applying the patch, create a user with utf-8 in password
- apply patches
- try to log in
- change the password
- log out
- try to log in

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Dobrica Pavlinusic <dpavlin@rot13.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>