Add tunnel_ip_version to tunnel_sync() error message
Add tunnel_ip_version to tunnel_sync() error message

Just to make it clear in the message, add the
tunnel_ip_version config option in the error
message, else the user has to consult the startup
message to know what the value is set to.

Trivialfix

Change-Id: Ic8d8b0d454e8202d1bfae52b77137eb9071508da

openstack/neutron,mahak/neutron,mahak/neutron,openstack/neutron,mahak/neutron,openstack/neutron