Akihiro Motoki cd49510878 Updating default keystone API verson to 3
The keystone API version 3 has become the default API version
for a long time and our CI already uses keystone v3 API only.

In addition, our documentation recommended to use the cached session,
so switching the default API version to 3 does not hit the limitation
on the maximum size of session data when using the cookie-based
sessions.

This is based on django_opensatck_auth review
https://review.openstack.org/#/c/158384/

Implements blueprint: default-keystone-api-3
Change-Id: I79e9fbd3567cc69468694dbf043fecf422347c7e
2017-12-21 03:24:07 +09:00
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