message: fix param server cloning
diff: @@ -139,7 +139,8 @@ class ParameterServer(Params):
  return self
  def clone(self):
  - return ParameterServer(json = self.ConvertToDict())
  + return ParameterServer(json = self.ConvertToDict(), \
  + log_if_default = self.log_if_default)
  def ConvertToDict(self, print_description=False):
  dict = {}
  