center restart with new shm; set center node ssn.

lichao

2021-06-02 993c556000a414011626770540678948f16eaa9e

 box/center_topic_node.cpp

@@ -56,7 +56,7 @@
} // namespace

CenterTopicNode::CenterTopicNode(CenterPtr center, SharedMemory &shm) :
    pscenter_(center), pnode_(new TopicNode(shm)), run_(false) {}
    pscenter_(center), pnode_(new TopicNode(shm, 200)), run_(false) {}

CenterTopicNode::~CenterTopicNode() { Stop(); }