Fixes to enable testing again (#3275)

* Updated library versions
* Use Karma alternative spec loading
* Fixed memory leak in URLTimeSettingsSynchronizer
* Introduce mock DataTransfer object to fix issue with firefox headless
* make resetApplicationState return a promise
* Remove BeforeAll
* Do not throw an error if root returns no children
* Adding missing parameters to ES tests
* Fixed TransactionService bug
* bump test coverage up to 64%

src/plugins/displayLayout/pluginSpec.js

@@ -29,10 +29,6 @@ describe('the plugin', function () {
     let openmct;
     let displayLayoutDefinition;
 
-    beforeAll(() => {
-        resetApplicationState(openmct);
-    });
-
     beforeEach((done) => {
         openmct = createOpenMct();
         openmct.install(new DisplayLayoutPlugin({
@@ -49,7 +45,7 @@ describe('the plugin', function () {
     });
 
     afterEach(() => {
-        resetApplicationState(openmct);
+        return resetApplicationState(openmct);
     });
 
     it('defines a display layout object type with the correct key', () => {