Hatohol arm plugin ceilometer c++ 7

These patches send events (alarm history) of ceilometer to Zabbix server.

We can see them in Web UI, althogh host names are not correctly shown.
As for taking care of host names, I will do it as a next step.
I merged the request because it's a trivial issue.

Please send another request for the patch or include it to the next pull request.