staging tests: update assert on log messages

5 jobs for !21 with improve-gitlab-ci in 2 minutes and 41 seconds (queued for 3 seconds)
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Status Job ID Name Coverage
  Check
passed #594
compile

00:00:55

failed #595
lint

00:01:46

 
  Lets Encrypt Staging
skipped #598
buster
skipped #596
jessie
skipped #597
stretch
 
Name Stage Failure
failed
lint Check
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$ pylint3 tests/test_acme_dns_tiny.py
************* Module tests/test_acme_dns_tiny.py
tests/test_acme_dns_tiny.py:1:0: F0001: No module named tests/test_acme_dns_tiny.py (fatal)
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit code 1