Updated openstack/openstack
Project: openstack/tempest  d222c9ba8b6bb3e6496ffb8af289f9a3dedaef5d

Inherit V2 keypair API's tests from V3 tests

There is a lot of copy&paste test code for Nova v2/v3 API tests.
In addition, we need to add many checks for API test coverage.
As the result, we should apply the same changes to v2 and v3 tests.

This patch reuse the test code between V2 and V3 Keypair APIs
Inheriting the V2 Keypair API's test from V3 tests.

Partially implements blueprint nova-api-test-inheritance

Change-Id: Ibe170a00e27619827678a1bbe104623ca24a81a3