Add lbaas support to vsphere by vmware-nsx plugin

Add lbaas support to vsphere by vmware-nsx plugin in neutron.

Depends-On: I6b92b946667ebbbd2721a99fd299981cfc99693f

Change-Id: I350d242c5b2df19970d75529c1b7ad8c405d4848
Partially-implements: blueprint kolla-ansible-support-vsphere

ansible/roles/neutron/templates/neutron_lbaas.conf.j2

@@ -2,6 +2,8 @@
 [service_providers]
 {% if enable_octavia | bool %}
 service_provider = LOADBALANCERV2:Octavia:neutron_lbaas.drivers.octavia.driver.OctaviaDriver:default
+{% elif neutron_plugin_agent == 'vmware_nsx' %}
+service_provider = LOADBALANCERV2:VMWareEdge:neutron_lbaas.drivers.vmware.edge_driver_v2.EdgeLoadBalancerDriverV2:default
 {% else %}
 service_provider = LOADBALANCERV2:Haproxy:neutron_lbaas.drivers.haproxy.plugin_driver.HaproxyOnHostPluginDriver:default
 {% endif %}