Add lbaas v2 scenario test

Make use of the new lbaas v2 resources.
This is an experimental gate job.

Will use the lbaas v2 namespace-haproxy driver instead of octavia.  Octavia
requires nested vms which is very slow and causes timeouts in devstack gates.

Change-Id: I7ea6e50a1da46622bdddcfccaf82203f473bfacc
3 files changed
tree: 4cb826297142138994ed67f174dbc01938cc82e5
  1. common/
  2. functional/
  3. scenario/