* origin/master:
  Relax SnippetParser to allow unannotated methods in DiSL class
  Refactor GuardResover.getGuardMethod()
  Use lazy-initialized singleton in GuardResolver
  Update GuardResolver class comment
  Extended InvocationStaticContext
  Cosmetic changes to Parameter class
  Allow fields without annotations in DiSL classes
  Set multi-value argument delimiter in InsnNodeMarker
  Insert a TODO to get rid of singleton GuardResolver
  Call shutdown() on socket before close() in DiSL and Shadow VM agents