Refactored loadbalancer module breaking backward compatibility

Module option 'listeners' has been removed because it shares
functionality and a huge amount of code with
lb_{listener,member,pool} modules.

Co-Authored-By: Rafael Castillo <rcastill@redhat.com>

Change-Id: I839365bd3485859a2351b0124eae9d09a9d0b31a

.zuul.yaml

@@ -79,19 +79,25 @@
       - ^plugins/modules/lb_pool.py
       - ^plugins/modules/loadbalancer.py
     vars:
-      configure_swap_size: 8192
-      tox_install_siblings: false
+      configure_swap_size: 4096
+      devstack_local_conf:
+        post-config:
+          $OCTAVIA_CONF:
+            controller_worker:
+              amphora_driver: amphora_noop_driver
       devstack_plugins:
         designate: https://opendev.org/openstack/designate
         octavia: https://opendev.org/openstack/octavia
       devstack_services:
         designate: true
-        neutron-dns: true
         octavia: true
         o-api: true
         o-cw: true
-        o-hk: true
         o-hm: true
+        o-hk: true
+        neutron-dns: true
+      tox_extra_args: -vv --skip-missing-interpreters=false -- loadbalancer
+      tox_install_siblings: false
 
 - job:
     name: ansible-collections-openstack-functional-devstack-octavia