Provide an option to disable auto-hashing of keystone token

[Lin Hua Cheng]

Token hashing is performed to be able to support session with cookie backend. However, the hashed token doesn't always work.

We should provide an option for user to turn off token hashing

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/201360

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/201360
Committed: https://git.openstack.org/cgit/openstack/django_openstack_auth/commit/?id=ece924a79d27ede1a8475d7f98e6d66bc3cffd6c
Submitter: Jenkins
Branch: master

commit ece924a79d27ede1a8475d7f98e6d66bc3cffd6c
Author: lin-hua-cheng <email address hidden>
Date: Mon Jul 13 15:51:58 2015 -0700

    Configurable token hashing

    Provide an option for operator to turn off token
    hashing to be performed by horizon.

    In some deployment where PKI token format is used
    for keystone, token hashing causes issue and results
    to 401 error in horizon.

    Change-Id: I187b1486db2e453fd49298e1478e30abe97e54fe
    Closes-Bug: #1473588

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/206765

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/206765
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=48e651d05cbe9366884868c5331d49a501945adc
Submitter: Jenkins
Branch: master

commit 48e651d05cbe9366884868c5331d49a501945adc
Author: Brad Pokorny <email address hidden>
Date: Tue Jul 28 16:44:00 2015 -0700

    Configurable token hashing

    Provide info on the option for operators to turn off token
    hashing to be performed by horizon.

    In some deployments where PKI token format is used for keystone,
    token hashing causes 401 errors in horizon.

    Depends-On: I187b1486db2e453fd49298e1478e30abe97e54fe

    Change-Id: I5ebc07850b14b2f2f52fc659831d6cd4aa9f83c3
    Closes-Bug: #1473588