[AAE-7101] - Introduced Eslint to ACA and added some fix to avoid errors (#2424)

* Conversion to ESlint

* Fixed ESLINT for ACA

* [AAE-6638] - typo in eslint file

* [AAE-6638] - attempt to fix problem on linting

* Check caching to improve lint speed

* Improved eslint for content-app

* Added new cache

* Remove cache file

* Removed eslintcache

* Attempt to make eslint run on travis

* Slow ng lint on travis

* Fixed eslint error

projects/aca-shared/src/lib/adf-extensions/extensions-data-loader.guard.spec.ts

@@ -122,9 +122,7 @@ describe('ExtensionsDataLoaderGuard', () => {
     it('should call canActivate only once', () => {
       const subject1 = new Subject<true>();
       const extensionLoaders = {
-        fct1: function () {
-          return subject1.asObservable();
-        }
+        fct1: () => subject1.asObservable()
       };
       const extensionLoaderSpy = spyOn(extensionLoaders, 'fct1').and.callThrough();
       const guard = new ExtensionsDataLoaderGuard([extensionLoaders.fct1]);