contrail-collector core continuously in ha setup
contrail-collector core continuously in ha setup

- http client gets deleted on discovery refresh

Change-Id: I7809a1f139cfc03b748ea5d1fcbe68e9c8b96abc
Closes-Bug: 1613896

tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller