ESLint upgrade, implement additional rules (#3230)

* upgrade to ESLintv7, added overrides for rules violated
* removed overrides for spec files
* fixed no-prototype-builtins issues
* added rules for default-case-last, default-param-last, grouped-accessor-pairs, no-constructor-return, and added override for one violation

Co-authored-by: Andrew Henry <akhenry@gmail.com>
Co-authored-by: Shefali Joshi <simplyrender@gmail.com>

example/generator/generatorWorker.js

@@ -1,5 +1,5 @@
 /*****************************************************************************
- * Open MCT, Copyright (c) 2014-2017, United States Government
+ * Open MCT, Copyright (c) 2014-2020, United States Government
  * as represented by the Administrator of the National Aeronautics and Space
  * Administration. All rights reserved.
  *
@@ -20,8 +20,6 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
-/*global self*/
-
 (function () {
 
     var FIFTEEN_MINUTES = 15 * 60 * 1000;