Add monitoring of ArmPlugin(zabbix).

If a failuer in connection with the ArmPlugin or ArmPlugin in, then perform notice of event and register trigger.

The variable type is HatoholPluginWatchPoint, but the name is type. This looks unmatched.
As mentioned in the defined line of HatoholPluginWatchPoint, its name is not good.
How about using HatoholPluginWatchType.