fix center handle ssn after node restart.

lichao

2021-04-26 150e192a7ddf19783a0f4a81b87d270c0812277a

 src/bh_api.h

@@ -36,7 +36,9 @@
                     int *reply_len,
                     const int timeout_ms);

int BHQueryTopicAddress(const void *topics,
int BHQueryTopicAddress(const void *remote,
                        const int remote_len,
                        const void *topics,
                        const int topics_len,
                        void **reply,
                        int *reply_len,