Add setup function for payload test instance

The instance will listen on TCP port 80 and serve up a Apache
welcome page.  This can be put behind a load balancer to validate
operation.

zaza/openstack/charm_tests/octavia/setup.py

@@ -22,6 +22,8 @@ import zaza.openstack.utilities.cert as cert
 import zaza.charm_lifecycle.utils
 import zaza.openstack.charm_tests.test_utils
 import zaza.openstack.charm_tests.glance.setup as glance_setup
+import zaza.openstack.utilities.openstack as openstack
+import zaza.openstack.configure.guest
 
 
 def add_amphora_image(image_url=None):
@@ -88,3 +90,22 @@ def configure_octavia():
     with _singleton.config_change(cert_config, cert_config):
         # wait for configuration to be applied then return
         pass
+
+
+def prepare_payload_instance():
+    """Prepare a instance we can use as payload test."""
+    session = openstack.get_overcloud_keystone_session()
+    keystone = openstack.get_keystone_session_client(session)
+    neutron = openstack.get_neutron_session_client(session)
+    project_id = openstack.get_project_id(
+        keystone, 'admin', domain_name='admin_domain')
+    openstack.add_neutron_secgroup_rules(
+        neutron,
+        project_id,
+        [{'protocol': 'tcp',
+          'port_range_min': '80',
+          'port_range_max': '80',
+          'direction': 'ingress'}])
+    zaza.openstack.configure.guest.launch_instance(
+        glance_setup.LTS_IMAGE_NAME,
+        userdata='#cloud-config\npackages:\n - apache2\n')