Some files still use trademark OpenStack LLC in header, which
should be changed to OpenStack Foundation.
NOTE: tools/install_venv.py is not synced from oslo-incubator, so
it is modified too.
Now that all the other tests are moved out of the tests directory
we can rename tests -> api to reflect that these tests are api
testing, and need to use only the internal clients.
Clean up references from other parts of OpenStack to the new api
Reorder the imports as required with this naming change.