DPDK: Pkt->vp_head has different address than mbuf->buf_addr.
DPDK: Pkt->vp_head has different address than mbuf->buf_addr.

In case of indirect mbufs we MUST set vp_head to correct value.

Change-Id: I666275303e0f922fc20f67d1a9c06b6096d80e32
Closes-bug:#1509318

codilime/contrail-vrouter,codilime/contrail-vrouter,codilime/contrail-vrouter,codilime/contrail-vrouter