This PS moves the neutron agents to run as child processes of either
the pause container or use the hosts init system (for k8s <1.10)
to prevent defunct process sprawl.
Change-Id: I3392bdc957144c1aa83314583d57183d35279336
Co-Authored-By: Hyunsun Moon <hyunsun.moon@gmail.com>
Signed-off-by: Pete Birley <pete@port.direct>
e0f076b658