port test_availability_zone into nova 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.

Partially implements blueprint nova-v3-api-tests

Change-Id: Ia40f9cbb901b0ef18f91ae84b7c86d879f8834cf
Merge "port test_availability_zone into nova v3 part1"