Updated openstack/openstack
Project: openstack/neutron  1694d2419b128d38e48575aa59b5ad310f99f05f

Define some abstract methods in VpnDriver class

Define the <op>_ipsec_site_connection() methods to ensure any new
service drivers will implement them.

Closes-Bug: 1326793

Change-Id: Idfe67632893592859990db486393a7108362447e