Revert "Run identity v3 only job in nova"
Revert "Run identity v3 only job in nova"

This reverts commit b8d80d502d1ada46d231c6edf0578d825ffe8455.

There was no sign off from the Nova PTL or anyone from the
Nova core team about running a non-voting keystone v3-only
job on all nova changes.

If keystone v2 is deprecated, then devstack should be
changed to run keystone v3 only by default (which I
actually think was tried around the Newton summit but
things started failing pretty hard).

Anyway, if this was just a one-time test, then it looks
like it's passing and things are fine.

If someone wants this for further verification while a
long-term plan is being worked out for the keystone API
support story, then this job should be in the experimental
queue, not the check queue.

Change-Id: If7d17ca2e5bfef9b47ccab68e8c4195a39ca8e86

Tesora/tesora-project-config,dongwenjuan/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,openstack-infra/project-config,openstack-infra/project-config