Remove useless startup logs from jboss when starting cask

silenceask.scala

def silenceJboss(): Unit = {
  // Some jboss classes don't have manners and think that it's ok to write to
  // logs from their static initializers. This is a hack to silence this
  // rather rude behaviour.
  val tmp = System.out
  System.setOut(null)
  org.jboss.threads.Version.getVersionString() // this causes the static initializer to be run
  System.setOut(tmp)

  // Other loggers print way too much information. Set them to only print
  // interesting stuff.
  val level = java.util.logging.Level.WARNING
  java.util.logging.Logger.getLogger("org.jboss").setLevel(level)
  java.util.logging.Logger.getLogger("org.xnio").setLevel(level)
  java.util.logging.Logger.getLogger("io.undertow").setLevel(level)
}