getSPID
public static java.lang.String getSPID(java.sql.Connection connection)
Convenience Method for getting SPID from a Connection instance.  If the connection has a SPID then it
 is returned, otherwise, it returns the SPID using DBManager.getSPID().  Using DBManager.getSPID() is expensive,
 since it calls application_id() under db2.  This method helps transition the code from DBManager.getSPID() to
 something less expensive, while minimizing the changes to the code.
- Parameters:
- connection-- ConRefinstance
- Returns:
- SPID