Picking the following fix from mainline:

https://github.com/Juniper/contrail-controller/commit/245ea2ede2b9e0d1845d437b4585a0f71e836992
Setting the gw in the Namespace link local table, to point to gateway ip of left subnet so that packets destined to VM's on private network side will be forwarded to GW address which is owned by Agent/Vrouter