updating common files

updating files: [".kitchen.yml", ".rubocop.yml"]
updating common files

updating files: [".rubocop.yml"]
updating common files

updating files: [".rubocop.yml"]
lint gemfile

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
update guardfile checks

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
lint gemfile

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
Merge pull request #2 from TelekomLabs/update-common

updating common files