InterVpnLink: Nexthop in leaked routes is wrongly set

As it can be seen in fib table, the nexthop for leaked routes (origin=iv) is wrong:

opendaylight-user@root>fib-show
RD Prefix NextHop Label Origin
-------------------------------------------------------------------
500:500 5.5.6.1/32 10.85.106.69 20002 b
500:500 10.0.0.1/32 70009 l
500:500 22.0.0.0/24 10.85.106.69 20002 b
e556a8a5-6a85-4ded-92fa-c779a6886451 40.0.0.1/32 70003 l
e556a8a5-6a85-4ded-92fa-c779a6886451 30.0.0.1/32 70004 l
600:600 5.5.6.1/32 Ipv4Address [_value=10.0.0.50] 70014 iv
600:600 5.5.7.1/32 Ipv4Address [_value=20.0.0.50] 70012 iv
600:600 5.5.7.1/32 10.85.106.69 70012 iv
600:600 20.0.0.1/32 70010 l
600:600 23.0.0.0/24 Ipv4Address [_value=20.0.0.50] 70013 iv
600:600 23.0.0.0/24 10.85.106.69 70013 iv
600:600 22.0.0.0/24 Ipv4Address [_value=10.0.0.50] 70011 iv