[WFLY-3499], increase POA_QUEUE_MAX maximum value to 500 as we defined in EAP5.
Remove unused var
Merge pull request #6389 from bstansberry/remove-unused

Remove unused var
Merge pull request #6385 from soul2zimate/WFLY-3499

[WFLY-3499], increase POA_QUEUE_MAX maximum value to 500 as we defined in EAP5.