While processLoop is running don't destruct the threads too early

on zos and windows to avoid intermittent crashes.

Fixes #102

Signed-off-by: Ravali Yatham <rayatha1@in.ibm.com>

src/ibmras/monitoring/agent/threads/WorkerThread.cpp

@@ -43,7 +43,11 @@ void WorkerThread::start() {
 }
 
 void WorkerThread::stop() {
- source->complete(NULL);
+ // Issue 102: By completing pull sources too early might
+ // intermittenlty destruct while still in processLoop.
+ #if !defined(_WINDOWS) && !defined(_ZOS)
+ source->complete(NULL);
+ #endif
  running = false;
 
  // Issue 99: By setting stopped to true too early, ThreadPool