[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/package.json

@@ -14,7 +14,7 @@
     "build:dist": "npm run validate-config && npm run style:dev && npm run server-versions && rimraf dist && node --max_old_space_size=30000 node_modules/.bin/ng build --prod  --build-optimizer=false  --aot=false --app dist",
     "style:dev": "npm run webpack -- --config  config/webpack.style.js --progress --profile --bail",
     "copy:dev": "node ./config/dev-copy-watch.js",
-    "test": "ng test",
+    "test": " npm run clean-lib-angular && ng test --single-run",
     "lint": "ng lint",
     "e2e": "ng e2e",
     "validate-config": "ajv validate -s ../lib/core/app-config/schema.json -d ./src/app.config.json --errors=text --verbose",