keystone integration redux

[Jesse Andrews]

Currently the keystone middleware for nova is located in keystone (nova_auth_token).

It was put there due to the timing of keystone + nova during the diablo release. The middleware should be moved to nova (as it is a keystone middleware to internal nova datastructure middleware).

This will be done with several changes:

* add nova_auth_token into nova
* update nova_auth_token in keystone to say that it is deprecated, use the version in nova
* update devstack to use the nova version
* remove nova_auth_token during E4

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/3135

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/3135
Committed: http://github.com/openstack/nova/commit/a47b5276244dba9c0a9058e6868522cf3fb3cada
Submitter: Jenkins
Branch: master

commit a47b5276244dba9c0a9058e6868522cf3fb3cada
Author: Vishvananda Ishaya <email address hidden>
Date: Wed Jan 11 10:42:00 2012 -0800

    Brings back keystone middleware

     * Adds ec2 auth middleware
     * Adds keystonecontext middleware
     * Notes alternative configurations in paste config
     * Fixes nova portion of bug 917408

    Change-Id: I9909d6d235445b1413d1cc0fb61e99e1ab819438

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/3365

[Dolph Mathews (dolph)]

I assume this is in progress on both sides of the fence ;)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/3695
Committed: http://github.com/openstack/keystone/commit/9858e08d44c89f5aa7bf38e5235e4c05fffdb96d
Submitter: Jenkins
Branch: master

commit 9858e08d44c89f5aa7bf38e5235e4c05fffdb96d
Author: Vishvananda Ishaya <email address hidden>
Date: Thu Feb 2 11:36:26 2012 -0800

    Removes nova middleware and config from keystone

     * Everything has been moved back into nova
     * Fixes bug 917408

    Change-Id: Id7e3a0eaa90cc0a32f84fdd587d50e2eba00800b

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/3365
Committed: http://github.com/openstack/nova/commit/6b532096f6c72627dccb32fa49e8045d6afbdc6d
Submitter: Jenkins
Branch: master

commit 6b532096f6c72627dccb32fa49e8045d6afbdc6d
Author: Ziad Sawalha <email address hidden>
Date: Tue Jan 24 13:03:32 2012 -0600

    Use Keystone Extension Syntax for EC2 Creds

    - Syntax is OS-KSEC2:ec2Credentials (not ec2Credentials)
    - adds to fix for bug 917408
    - Syntax also requires a call to /tokens instead of /ec2tokens
    - Changes are compatible (old syntax supported)
    - Warning will be issued to log if URL syntax is old

    Change-Id: I5ff9d1643122de2f383517e60f15852720c54490