Revert "Sprint task - try out a workaround for http://bugs.eclipse.org/444471"

This reverts commit 4cf50d54cd3d8d46b056c7403fccc8f0c1d63a1c. Since it was not working in the nightly test execution and it leads to a longer duration of the test, the workaround is removed.
Non-sprint task - API overview UML2 diagram added (format: ObjectAid).