honor MaxConnectionsLifetimeSeconds for policy server
honor MaxConnectionsLifetimeSeconds for policy server

Signed-off-by: Slawek Ligus <7f6453cf264d8e0f493c7129c1ba7253720c5b2a@pivotal.io>

cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release