[Param] Modified TriggerID and HostID failure of the monitoring server self.

ID is to use a value close to the maximum of ULONG_MAX(64bit).
Therefore, to set a negative number.
And, change the header file that declares the TriggerID/HostID.
Merge pull request #512 from project-hatohol/modify_self_triggerid_hostid

Modified TriggerID and HostID failure of the monitoring server self.