Do not check for unit physical existence:
some LSB wrapped services are not stored in path as the typical systemd units,
it blocks them from configuration. The systemctl calls do handle the non-existence
of the systemd units fine
Adapt the testsuite output files
Update changes and version to 3.1.21
Merge pull request #183 from vmoravec/allow-service-without-file

Do not check for service unit file | bnc#864934