port test_images and test_server_actions into v3 part1

This changeset only copies the v2 files into the appropriate v3
directories unchanged. This is being tried in order to make
reviewing of the porting easier as gerrit will display only what
is actually changed for v3 rather than entirely new files. There
is no image api in nova v3 api, so the images_client won't be ported
into v3 test. We will use glance directly.

Partially implements blueprint nova-v3-api-tests

Change-Id: I058407afb7bba4d55c619db27f59a91a46cbc6cf
Merge "port test_images and test_server_actions into v3 part1"