add and find by id for cam_dev

xuxiuxi

2019-03-04 845c62691a5b19faf67775f712f294fa0d1789f6

 QiaoJiaSystem/FaceDetectServer/FaceExtractServerI.cpp

@@ -47,7 +47,8 @@
        }
        return feature;
    } else {
        throw std::runtime_error("shareMemory attach faild");
        ERR("shareMemory attach faild");
//        throw std::runtime_error("shareMemory attach faild");
    }

}