Fixes errors logging in as a user with no password

A traceback in passlibe happened when trying to login as a user that
didn't have a password set.  This gave an unexpected status code. This
patch makes the server return a 401 instead.

Change-Id: I9cc64aeefb9e7488579482d4ee95df198af70801
Partial-Bug: #1226466
Imported Translations from Transifex

Change-Id: I999faa6221fb7d1da245add3eeec293ebe1818ae
Merge "Imported Translations from Transifex"
Merge "Fixes errors logging in as a user with no password"