message: [cluster-test] removing infinite recursion in Debug implementation
  Closes:
diff: @@ -407,7 +407,7 @@ impl fmt::Display for Instance {
  impl fmt::Debug for Instance {
  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  - write!(f, "{:?}", self)
  + write!(f, "{}", self)
  }
  }
  