Create amphora flavor for Octavia

* Add octavia_identity in order to generate a Keytone profile
  for Octavia
* Add a nova.client class that defines an amphora flavor

Change-Id: I13e01d21f4e097f0348ef9f491dce1c527c91204
diff --git a/keystone/client/service/octavia.yml b/keystone/client/service/octavia.yml
index 819cd79..4e14217 100644
--- a/keystone/client/service/octavia.yml
+++ b/keystone/client/service/octavia.yml
@@ -28,3 +28,11 @@
                 admin_address: ${_param:octavia_service_host}
                 admin_port: 9876
                 admin_path: '/'
+        octavia_identity:
+          admin:
+            user: octavia
+            password: ${_param:keystone_octavia_password}
+            project: service
+            host: ${_param:keystone_service_host}
+            port: 5000
+            region_name: ${_param:openstack_region}