[Worker] Log. how long it takes to quitAndWait a worker

* sometimes the shutdown sequence of swift takes extremly long, this is to identify which workers are affected
* reduced "wait time"
* function so each worker can have its own "wait" time
* for a worker there are 2 "waits", the quitAndWait of the worker and the wait of CRegularThread (dtor)


Originally Ref T145, T647

src/blackmisc/simulation/backgroundvalidation.cpp

@@ -104,6 +104,11 @@ namespace BlackMisc
             return true;
         }
 
+        unsigned long CBackgroundValidation::waitTimeoutMs() const
+        {
+            return 0;
+        }
+
         void CBackgroundValidation::doWork()
         {
             if (m_inWork) { return; }