Making stop condition optional by using a flag (#113)

* apply stop condition flag (default: ignore the stop condition)

rl_coach/graph_managers/graph_manager.py

@@ -669,4 +669,4 @@ class GraphManager(object):
             self.memory_backend = get_memory_backend(self.agent_params.memory.memory_backend_params)
 
     def should_stop(self) -> bool:
-        return all([manager.should_stop() for manager in self.level_managers])
+        return self.task_parameters.apply_stop_condition and all([manager.should_stop() for manager in self.level_managers])