Add a new KTR tracepoint in the KTR_CALLOUT class to note when a callout routine finishes executing.
Add a new KTR tracepoint in the KTR_CALLOUT class to note when a callout
routine finishes executing.

MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase