Command changes: results displayed in response to DISPLAY CONN command from runmqsc

The data that is returned in the EXTURID field on the results shown for the DISPLAY CONN runmqsc command has changed when there is no XA transaction associated with the connection.

Prior to IBM® MQ 8.0, if there is no XA transaction associated with the connection then within the EXTURID attribute the XA_FORMATID field would be show as [00000000]. From IBM MQ 8.0, if there is no XA transaction associated with the connection, then the XA_FORMATID value is shown as the empty string [].