Execute Action at monitoring server failure.(deal with Issu 251)

Add a mechanism to do the action, when detected of the monitoring server failure (e.g. doesn't reply).

When Arm thread initializ, register trriger and monitoring server info to chashDB(sqlite).
when a failure was detected, Update the trigger and Register the event, and to perform the action(if registration).
TriggerID / Message Comment is a provisional value.

please confirm and comment.
I understand you strip _CONNECT_. However, this term is a little vague.
For example, don't we use a HTERR_ARM_BASE prefix for these error such as HTERR_ARM_BASE_INTERNAL_ERROR.