Bug 402301: Migration: UI Independent tests

Create additional fragments and migrate tests:
* org.eclipse.scout.jaxws216.test
* org.eclipse.scout.rt.testing.client.test
* org.eclipse.scout.rt.testing.server.test

https://bugs.eclipse.org/bugs/show_bug.cgi?id=402301

Change-Id: Ie88a5c4c920503aa90322cc9e77f064f51c50f1c