Add `Svc.Ping` port response to Active Component generated base class.

[timcanham]

F´ Version	v3.4.3
Affected Component	all active

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Feature Description

Have the generated base class automatically handle pings from the Svc.Ping port instead of having developers write the same code every time.

Rationale

The requirement for the ping port handler is to return the supplied code sent to the Svc.Ping port to confirm that the thread is still alive. The implementation is pretty much always the same:

    void CmdSequencerComponentImpl ::
      pingIn_handler(
          NATIVE_INT_TYPE portNum, /*!< The port number*/
          U32 key /*!< Value to return to pinger*/
      )
    {
        // send ping response
        this->pingOut_out(0,key);
    }

The generated active component base class could implement this as a virtual function that would be used the majority of the time, but could be overridden by the implementation class if needed.