fixing tests in omx-core
Merge pull request #939 from dennishendriksen/feature/studydefinitionservice

Fix generated service classes, fix tests in StudyDataRequestDecorator, fix small bug
Fix test
Merge pull request #942 from erwinwinder/master

Fix test
Merge pull request #940 from RoanKanninga/master

fixing tests in omx-core
Merge pull request #941 from dennishendriksen/feature/studydefinitionservice

Fix tests due to data API changes
add test