Insteon: Catch Status Requests in Unique _process_message Routines

Controller and Security both have unique _process_message routines that catch messages unique to them.

Before processing a message, these routines need to check to see if the incoming message is in response to a status request.  Otherwise eventually the ALDB version number will match one of these unique message types, and MH gets confused.
Merge pull request #218 from krkeegan/insteon_is_info_fix

Insteon: Catch Status Requests in Unique _process_message Routines