Merge pull request #6 from ehaselwanter/master

add Gemfile.lock to ignore list and remove it from tree
add utf8 header
add copyright header
Merge pull request #7 from TelekomLabs/robocop

add utf8 and copyright header
add openstack group
Merge pull request #8 from TelekomLabs/tests

add openstack group
    add a common run_all_linters task so we can use the same task in all ci pipelines
    fail on any tag