test to skip sonar run (all java files are generated anyway)
Revert "test to skip sonar run (all java files are generated anyway)"

This reverts commit ca0bc3eb66b3a72602a9b0c153855cd1b1fd2029.
test to skip sonar run (all java files are generated anyway)
add empty dummy file to test sonar plugin which fails on submodules w/o java files
clean pom.xml