Updated openstack/openstack
Project: openstack/tempest  a46e3fb3f01adfeef689de963f092acb21c320b8

Migrate test_load_balancer_basic to tempest client

This patch migrates the load balancer basic ops scenario test from official
client to tempest clients.

It also removes the NeutronRetriever class from the test script

Partially-implements: bp:tempest-client-scenarios

Change-Id: I4f3da202646821671d0e98707031a49973c256b2