Simplify neutron lbaas jjb config
Simplify neutron lbaas jjb config

This simplifies neutron lbaas' jjb configs to make them more readable.
Made it easier to determine if Xenialification was necessary so figured
I would push it up.

Change-Id: I461e20a3c035d44c856ac213360bb1a5dd80e89f

Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config