nova: use v2.1 only

[OpenStack Infra]

With nova v2 on the way out to be superseded by v2.1, we should go through the docs to ensure we're in-line with nova dev in this regard. Anywhere we refer to v2 should probably be updated to be v2.1.

I believe v3 has already been removed from basically everything.

Some of the areas that need changing can be found in this patch:

https://review.openstack.org/214085
commit 4a18f7d3bafcdbede48500aac389e0a770b8e6a8
Author: John Garbutt <email address hidden>
Date: Thu Aug 27 11:15:54 2015 +0900

    api: use v2.1 only in api-paste.ini

    I have taken a look at:
    * removed /v3
    * /v2 and /v1.1 now uses v2.1 legacy mode
    * add deprecation warnings for old v2 code and ec2
    * ensure legacy v2 code is not used by default

    DocImpact
    UpgradeImpact

    Depends-On: I513b54eeacee1486ea11b85913ab2d21727fc5f9
    dropping a tempest test that assumes certain validation order

    Change-Id: I94b1305882598cc259a267dc8e954ab242baf7d1

[Diane Fleming (diane-fleming)]

https://review.openstack.org/#/c/229546/

[Diane Fleming (diane-fleming)]

https://review.openstack.org/233253

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/229546
Committed: https://git.openstack.org/cgit/openstack/api-site/commit/?id=6645521bac0df9d6fb53fc021f6e058744c6ecdb
Submitter: Jenkins
Branch: master

commit 6645521bac0df9d6fb53fc021f6e058744c6ecdb
Author: John Garbutt <email address hidden>
Date: Wed Sep 30 18:40:17 2015 +0100

    Collapse Compute API v2 and v2.1 together

    Collapse into a single Compute API docs because
    there is only one Compute API.

    This combination should help with both maintenance and future
    migration work.

    Partial-Bug: #1491227

    Change-Id: I84c0b011c6c1c4cf7bff7793591eb41a847b7618

[Diane Fleming (diane-fleming)]

https://review.openstack.org/#/c/233253/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/233253
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=22653b755803771c21dc545641127860a2d92ea5
Submitter: Jenkins
Branch: master

commit 22653b755803771c21dc545641127860a2d92ea5
Author: Diane Fleming <email address hidden>
Date: Fri Oct 9 14:57:34 2015 -0500

    Remove mention of anything less than Compute v2.1

    Closes-Bug: #1491227

    Change-Id: If463a07ad159535064d0b7d05a4e194e52c9f562

[Sharat Sharma (sharat-sharma)]

Assigning to myself since there is no activity from a long time.

[Atsushi SAKAI (sakaia)]

Docbook side is finished already

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.