chore(webpshere): make EAR or WAR deployment interchangable

- testsuite now creates deployments aligned to the application server
- on WAS we need EARs to enrich them with deployment metadata instead of WARs
- TestContainer.java / AbstractFoxPlatformIntegrationTest.java get a new method 'processArchiveDeployment' which should be called before the deployment is returned
- aligned testsuite to all changes

related to #CAM-2978