remove the nova v3 xml tests from the code

this is phase 2 in removing the xml tests from the code, should
give us an idea on the run time differences now that testr will
pull these out of the scheduler.

Part of bp:remove-v3-xml-api

Change-Id: I0fbb19b6d0b6dbbcb9c9c9e0cb86690abc4790a0
48 files changed