Small fix to systemd dovecot restart

1 job for tests in 11 minutes and 35 seconds
Status Job ID Name Coverage
  Test Mail
failed #31330


Name Stage Failure
test_mail Test Mail
Identity added: /root/.ssh/key (ale@boiler)
stopping VM group 051e...
Uploading artifacts for failed job
Uploading artifacts...
/builds/ai3/config/build-31330/ansible.log: found 1 matching files and directories

/builds/ai3/config/build-31330/logs: found 4 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=31330 responseStatus=201 Created token=KXPUz2zT
Cleaning up file based variables
ERROR: Job failed: exit code 1