Tweak sleep to see whether this is relevant for Java 17

Author: chadlwilson

src/spec/ruby/rack/application_spec.rb

@@ -700,7 +700,7 @@ def createRackServletWrapper(runtime, rackup, filename); end
         if app_count.addAndGet(1) == 2
           raise org.jruby.rack.RackInitializationException.new('failed app init')
         end
-        sleep(0.05)
+        sleep(0.1)
       end
       app
     end