aaa: Pass password across filters so it will be known during LoginUserCommand

As basic authentication passed auth record to Login filter, the passsword
used for authentication was not passed, hence was not set in the session data container.

Change-Id: Ie48f8f1408b17882337f4fd0a8c38f7829472cf2
Bug-Url: https://bugzilla.redhat.com/1141541
Topic: AAA
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>