Fix the asynchronous call to the Parameter Service save function
Fix the asynchronous call to the Parameter Service save function

* Remove the Promise outcome handlers to prevent double-callbacking
* Implement 'formatResult' to always return empty string, which is what
  the RPC is expecting, apparently.

vistadataproject/metaPureJS,vistadataproject/metaPureJS,vistadataproject/metaPureJS