Define and use Topic IDs instead of fixed Msg IDs

[jphickey]

Is your feature request related to a problem? Please describe.
The "topic ID" concept allows MsgID values to be assigned using a logical pattern for multiple CPUs. This is much more flexible for an out-of-the-box config than fixed MsgIDs.

Describe the solution you'd like
Define application msgids based on the topic ID and conversion macro.

Additional context
This won't change the message IDs for the default case, just makes them easier to manage for various use cases.

Requester Info
Joseph Hickey, Vantage Systems, Inc.