This patch adds Octavia Data Plane performance testing.
It launches a jump host and a given number of clients (virtual machines).
They have Apache Web server pre-installed
It also creates a load balancer, listener, pool and adds those clients to the
pool. The uses ApacheBench to benchmark the load balancer.
Getting "requests per second" back to the output
Change-Id: I595caa4d78ff287d18a1877dcd7efb8d805bd5c4
7eb647d120