Add AMQP conn check for ceilo-agent-central ocf

Improve status check by AMQP port connection tracking.
Ceilometer-agent-central service will be restarted by
pacemaker, if amqp connection is lost. And monitor action
will report fail, unless amqp connection re-established.
Source: https://github.com/madkiss/openstack-resource-agents
0263ab71d319d3c398c5d29c4c0eb261db358ab1

DocImpact
Related blueprint pacemaker-improvements

Change-Id: I733e9473bda767c6396a63336c5e6b7ac6415fff
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Add AMQP conn check for ceilo-agent-central ocf"