test_rack_handler.rb - fix intermittent JRuby CI failures
test_rack_handler.rb - fix intermittent JRuby CI failures

We're testing the rack handler here, if JRuby handling of '0.0.0.0' isn't working, it should be elsewhere

puma/puma,puma/puma,puma/puma,eileencodes/puma,eileencodes/puma,puma/puma,eileencodes/puma,eileencodes/puma