The README.md has been update to reference the new course and the new
Eclipse version. In addition, the general pom.xml file has been updated
to include the newer versions of the dependencies, and the ear/pom.xml
has been modified to include more project information in the generated
EAR.

On the other hand, the testing mysql-ds.xml have been removed and the
standalone.xml testing files have been updated to include the datasource
data.

Some test classes have been refactorized for a more consistent use of
the OwnersDataset class and for a simpler test implementation.

This matchers makes the Response status easier to check in tests.

The REST layer has been added but with incomplete tests. Students will
have to complete the tests.

This commit includes an important refactorization regarding tests. Test
classes and datasets have been moved from the "service" project to a new
"tests" project. This way, any project can include this "tests" project
as a dependency in order to have access to these common testing
resources.