Rudder

When generating promise, we get "Exception caught during polcy update process: empty.max".

This is due to an uncheck list size in PrepareTemplateVarialbe

    def formatUsebundle(x:Seq[(Technique, String, Bundle)]) = {
       // max not possible
      val alignWidth = x.map(_._2.size).max  
      x.map { case (t, promiser, bundle) => s""""${promiser}"${" "*Math.max(0, alignWidth - promiser.size)} usebundle => ${bundle.name};"""}.mkString( "\n")
    }