This patch adds readiness and liveness to CNI. It checks presence
of NET_ADMIN capabilities, IPDB in working order, connection to
Kubernetes API, quantity of CNI add failures, health of CNI
components and existence of memory leaks.
Implements: blueprint cni-daemon-readiness-liveness
Change-Id: I9a4b871d196dbadfed687df93bb3cad97c957bfb
1e4b7f1109