This commit fixes#5072
Due to an issue in bzr, Clair container may consume a lot of CPU
resource while updating the vuln data. This commit mitigates the impact
by setting the cpu_quota of clair container. (default value of
cpu_period is 100000 in v2 docker-compose template)
This commit fixes a recently discovered issue on Kubernetes #4496
It make necessary to avoid calling `chown` to config files during the
bootstrap of the containers.
