kvs assignment updates user password

[Morgan Fainberg]

When updates to Grants are performed, the KVS assignment backend will cause a password update for the user to the current hash of the user's password.

This is because the .get_user method on identity_api includes the password element which is just fed back into .update_user here:
http://git.openstack.org/cgit/openstack/keystone/tree/keystone/assignment/backends/kvs.py?id=ce5fcb13c5fec5de3eeab58453713a061e40168a#n261

This should have little impact in the grand scheme because KVS is not suitable for anything except testing.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/64890

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/64890
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=331b4ca3310c6df0795c2e5d1b55809d17bc0768
Submitter: Jenkins
Branch: master

commit 331b4ca3310c6df0795c2e5d1b55809d17bc0768
Author: Morgan Fainberg <email address hidden>
Date: Fri Jan 3 11:11:26 2014 -0800

    Do not update password when updating grants in Assignment KVS

    Assignment KVS backend no longer performs an update that causes
    the user's password to be updated when updating grants. This
    potentially would have caused any/all grant updates to set the
    user's password to the current password hash, effectively making
    it impossible to login with the user. The longer-term fix
    should ensure that the backend does not need to update the user
    itself from the driver level.

    Change-Id: I74ffc643020fa077c39a0cf16847e397a0c24139
    Closes-bug: #1265887