bugfix: add missing thias/sysctl dependency to modulefile

since we still require modulefile due to kitchen tests, the dependencies must be fixed to be the same for metadata.json and Modulefile (which puppet ignores).

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
Merge pull request #26 from TelekomLabs/fix/modulefile

bugfix: add missing thias/sysctl dependency to modulefile