* 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
