gitlab: register configchanges so they stop the container, not using handler
 as these would cause it to restart twice on changes to the docker-compose.yml
gitlab: removed the kas option as it stopped gitlab from starting, probably we
 used the config from master and not 13.4.4
ansible: make tasks more pretty

disabled everthing related to prometheus, grafana and alertmanager
all the rest should be as before

closes #3 and #2

Updated gitlab config