Enable benchmarking of the Neutron LoadBalancer v1
lb-vip-create and lb-vip-list APIs. Due to the
different API scheme and confusing naming conventions
in Neutron (LB is v1 API and LBaaS for v2 API) the
appropriate code is explicitly marked with 'v1'
since this only implements the API v1 benchmarking.
Change-Id: I8a4f85bb62ae2a44be0a25d9a8327fd1ee48336b
2352e8565e