[fix] Fixes issue #4

We need to sleep for 1s after killing processes and before we attempt to
remove a container.  However, the sleep was done too early.

src/container_manager.cpp

@@ -1076,14 +1076,14 @@ void Container_manager::clean_config(string command)
 			_containers[i]->check_task_ownership(true, true);
 	}
 
-	if(kill_content)
-		sleep(1);
-
 	vector<Argo_container*>::iterator it;
 	for(it = _containers.begin(); it != _containers.end(); it++)
 	{
 		if(kill_content)
+		{
 			(*it)->kill_content(false);
+			sleep(1);
+		}
 		(*it)->remove();
 		delete *it;
 	}