Set compiler level
Revert "Set compiler level"

This reverts commit 0813d224919897950fb8efacd92490324abace37.
override compiler compliance level from java project with our level
Revert "TEMP: Logging for Test"

This reverts commit 8160b2909994e5b5aa38aa7ba21645bd397e2388.
Merge pull request #202 from nilshartmann/master

Set required compiler compliance level