Method shutdownWorkload

bindings/java/JavaWorkload.cpp:430–434

	}

	void shutdownWorkload(jobject workload, const std::string& workloadName) {
		auto clazz = getClass(workloadName.c_str());
		env->CallVoidMethod(workload, getMethod(clazz, "shutdown", "()V"));
		checkException();
	}

	std::string jtoStr(jstring str) {
		jboolean isCopy;