Add floating-network-name config option

Added a new configuration option to allow for setting the name
of the floating IP network. Defaults to ext-net.

Change-Id: I71baa14e27b2e3dea88faeede9c65b0c9d8693fa

src/config.yaml

@@ -39,6 +39,10 @@ options:
     type: string
     default: "ext_net"
     description: "neutron network"
+  floating-network-name:
+    type: string
+    default: "ext-net"
+    description: "floating IP network"
   swift-resource-ip:
     type: string
     default:

src/lib/charm/openstack/tempest.py

@@ -161,6 +161,13 @@ class TempestAdminAdapter(adapters.OpenStackRelationAdapter):
             else:
                 network = networks['networks'][0]
                 network_info['public_network_id'] = network['id']
+            networks = neutron_client.list_networks(
+                name=self.uconfig['floating-network-name'])
+            if len(networks['networks']) == 0:
+                hookenv.log("Floating network name not found")
+            else:
+                network_info['floating-network-name'] = \
+                    self.uconfig['floating-network-name']
         except:
             hookenv.log("Neutron is not ready, deferring neutron query")
         return network_info

src/templates/tempest.conf

@@ -62,6 +62,7 @@ public_network_id={{ identity_admin.network_info.public_network_id }}
 dns_servers={{ options.name_server }}
 {% endif -%}
 tenant_networks_reachable = false
+floating_network_name={{ identity_admin.network_info.floating_network_name }}
 [network-feature-enabled]
 ipv6=false
 [object-storage]