feat(integration-test): add protractor prototype
feat(e2e-tests): Add basic test setups

related to #CAM-1642
-Add start scripts for camunda-bpm-platform, webdriver, protractor
-Add test configurations for Admin, Tasklist and Cockpit
-Add test procedures for Admin, Cockpit and Tasklist
feat(integrtation-test): add semantic attributes

- add semantic attributes to increase accessibility of elements
- expand test procedures for all web apps