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
(cherry picked from commit 4c45ba2690)

healthcheck/neutron-sriov-agent

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+. ${HEALTHCHECK_SCRIPTS:-/usr/share/openstack-tripleo-common/healthcheck}/common.sh
+
+process='neutron-sriov-nic-agent'
+args="${@:-5671 5672}"
+
+if healthcheck_port $process $args; then
+  exit 0
+else
+  ports=${args// /,}
+  echo "There is no $process process connected via RabbitMQ ports ($ports) running in the container"
+  exit 1
+fi