Comment 2 for bug 1566358

According to instance cmdline from http://paste.openstack.org/show/493008/ instance was launched with non-huge-backed memory, therefore vhostuser doesn't work and OSTF was failed.

QA team should either implement OSTF for DPDK, or adjust flavor before OSTF with `nova flavor-key ${FLAVOR} set hw:mem_page_size=2048`.