Enable Dryrun

[rhmk]

dryrun is not working, because some shell scripts read variables which are unset.
To workaroung this you can assume values when starting in testmode
Use something like:

• name: set variable to blabla while in testmode
  set_fact: ...
  when: ansible_check_mode

see https://docs.ansible.com/ansible/2.5/user_guide/playbooks_checkmode.html