Update runtime settings from WildFly 8.2 to WildFly 10.0

[Ahli]

Since the tutorial ( https://wwu-pi.github.io/tutorials/lectures/acse/020_tutorial_jboss_project.html ) lists WildFly 10, this project may update to WildFly 10, too.

Right now, to resolve the 100+ problems that eclipse lists, the runtime in each of the four projects needs to be changed from WildFly 8.2 to 10.0 (right click each project in eclipse -> properties -> runtime -> select WildFly 10).
After fixing the runtime and cleaning the projects (projects (at the top) -> clean -> clean all projects), I only have a single warning left.

The project can be published to the server with the 8.2 setting, but having code that eclipse can properly verify and display improves readability and therefore understanding the example.

I assume my fellow students will find and read my post, thus I included steps how to change the settings and force eclipse to rebuild the project.