Allow mysql-connector to replicate from replica that doesn't have MASTER STATUS

We are currently using mysql-connector for our on-premise MySQL. Recently there's an effort of migrating the on-prem MySQL to Aurora.

During the migration we realized that if we point the mysql-connector to Aurora replica, it won't be able to retrieve GTID set, because that process has dependency on the following query:

mysql> SHOW MASTER STATUS;
Empty set (0.21 sec) 

This seems to be something that we can't bypass on Aurora. To enable replicating from a Aurora replica, we can add a fallback mechanism to the code where SHOW MASTER STATUS is called. 

I believe SHOW SLAVE STATUS could provide equivalent information in this case, the relevant fields are 

Relay_Master_Log_File

Exec_Master_Log_Pos

Executed_Gtid_Set