[AP-1394] bug fix for graceful exit (#1076)

* bug fix for graceful exit

* removed unnecessary condition

Author: amofakhar

pipelinewise/cli/pipelinewise.py

@@ -1320,7 +1320,7 @@ def stop_tap(self, sig=None, frame=None):
 
                 # Terminate all the processes in the current process' process group.
                 for child in parent.children(recursive=True):
-                    if os.getpgid(child.pid) == pgid and child.status == 'running':
+                    if os.getpgid(child.pid) == pgid:
                         self.logger.info('Sending SIGTERM to child pid %s...', child.pid)
                         child.terminate()
                         try: