Fix incorrect consumer calculation

[kalinchan]

Credit to @luiseufrasio

The imqcmd utility shipped with Open MQ software in Payara Server has a list destinations command that shows basic statistics of the number of producers, consumers and messages for each destination configured. After a cluster restart, the numbers shown by the command’s output are incorrect on a variable frequency, but close to the actual number to be shown. For example, where the number of consumers is 8 for a specific cluster instance, the number displayed might be 6, 7, 9, 10