Add healthcheck script for neutron-sriov-agent
Add healthcheck script for neutron-sriov-agent

This patch adds script for docker health check of neutron-sriov-agent service.
The script checks existance of service with opened connections to RabbitMQ.

Change-Id: Ief543580e6b717bb9dba62b19ffe12aff5395ff9

openstack/tripleo-common,openstack/tripleo-common