move org.eclipse.scout.rt.extension.client.test.fragment to org.eclipse.scout.rt.extension.client.test
Bug 402336: Changes in org.eclipse.scout.rt.extension.client.test.fragment

https://bugs.eclipse.org/bugs/show_bug.cgi?id=402336

- rename: remove ".fragment" suffix
- change maven packaging: eclipse-test-plugin
- remove "import static org.junit.Assert.*"
Merge remote-tracking branch 'eclipse/master' into master_testing