[ADF-2240] fix e2e and test in demo shell (#3035)

* fix e2e and test in demo shell

* test single run demo shell conf

* fix script e2e

* fix test lint problems

* remove async from nested test

* fix pdf test

* modify url load pdf strategy test

* SimpleChange import

* pdf viewer test fix

* remove force closing

* refactor pdf viewer
-remove promise approach
-add event rendered
-add destroy worker

* increment timeout

* use proxy files

* remove require

* fix viewer component test

* remove last require

* prefer use of done for txt viewer test

demo-shell/src/polyfills.ts

@@ -60,6 +60,10 @@ import 'zone.js/dist/zone';  // Included with Angular CLI.
  * Needed for: All but Chrome, Firefox, Edge, IE11 and Safari 10
  */
 import 'intl';  // Run `npm install --save intl`.
+/**
+ * Need to import at least one locale-data with intl.
+ */
+import 'intl/locale-data/jsonp/en';
 
 /**
  * Support custom event in IE11