Added keystone auth port to the nova config

Added the $KEYSTONE_AUTH_PORT to the keystone_authtoken
section of the create_nova_conf function.
This is required as without it nova doesn't communicate
to the keystone server. Generating an "Unauthorised (HTTP 401)"
page when acceesing /admin/.

Change-Id: Ibf4d9d1c21081a1e3de4ea765f4db6de5fbdb237
diff --git a/lib/nova b/lib/nova
index 5fd0beb..e4dae7c 100644
--- a/lib/nova
+++ b/lib/nova
@@ -398,6 +398,7 @@
         # Add keystone authtoken configuration
 
         iniset $NOVA_CONF keystone_authtoken auth_host $KEYSTONE_AUTH_HOST
+        iniset $NOVA_CONF keystone_authtoken auth_port $KEYSTONE_AUTH_PORT
         iniset $NOVA_CONF keystone_authtoken auth_protocol $KEYSTONE_AUTH_PROTOCOL
         iniset $NOVA_CONF keystone_authtoken admin_tenant_name $SERVICE_TENANT_NAME
         iniset $NOVA_CONF keystone_authtoken cafile $KEYSTONE_SSL_CA