[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/tslint.json

@@ -99,7 +99,6 @@
         "variable-declaration": "nospace"
       }
     ],
-    "typeof-compare": true,
     "unified-signatures": true,
     "variable-name": false,
     "whitespace": [