修改setup.py增加protobuf包

setup.py

@@ -4,7 +4,7 @@ setup(name='pyscalebox',
       description='level 2 pipeline api:send_message_L2(body)',
       author='zhangxiaoli',
       author_email='zhangxiaoli@cnic.cn',
-      requires=['os','grpcio','grpcio-tools'], # 定义依赖哪些模块
+      requires=['os','grpcio','grpcio-tools','protobuf'], # 定义依赖哪些模块
       py_modules=['pyscalebox','control_pb2','control_pb2_grpc'],  # 系统自动从当前目录开始找包
       # packages=find_packages(),
       license="apache 3.0"