tox-py36-ci-config against rdo ci-config repo failing because Pytest-cov leaves .coverage.hostname.number.number data files

[Sandeep Yadav]

Description:-

tox-py36-ci-config in rdo ci-config repo failing becaus Pytest-cov leaves .coverage.hostname.number.number data files

https://logserver.rdoproject.org/42/42542/1/check/tox-py36-ci-config/5477962/job-output.txt

~~~
2022-05-14 05:25:50.845498 | rdo-centos-stream | =========== 438 passed, 89 xfailed, 4 warnings in 636.31s (0:10:36) ============
2022-05-14 05:25:50.845508 | rdo-centos-stream | /home/zuul/src/review.rdoproject.org/rdo-infra/ci-config/.tox/py36/lib64/python3.6/site-packages/coverage/data.py:129: CoverageWarning: Data file '/home/zuul/src/review.rdoproject.org/rdo-infra/ci-config/.coverage.node-0002547555.55253.639726' doesn't seem to be a coverage data file: Couldn't use data file '/home/zuul/src/review.rdoproject.org/rdo-infra/ci-config/.coverage.node-0002547555.55253.639726': no such table: coverage_schema
2022-05-14 05:25:50.845521 | rdo-centos-stream | data._warn(str(exc))
2022-05-14 05:25:51.407528 | rdo-centos-stream | py36 finish: run-test after 638.30 seconds
2022-05-14 05:25:51.515438 | rdo-centos-stream | On branch master
2022-05-14 05:25:51.515490 | rdo-centos-stream | Your branch is ahead of 'origin/master' by 2 commits.
2022-05-14 05:25:51.515499 | rdo-centos-stream | (use "git push" to publish your local commits)
2022-05-14 05:25:51.515506 | rdo-centos-stream |
2022-05-14 05:25:51.515512 | rdo-centos-stream | Untracked files:
2022-05-14 05:25:51.515519 | rdo-centos-stream | (use "git add <file>..." to include in what will be committed)
2022-05-14 05:25:51.515525 | rdo-centos-stream | .coverage.node-0002547555.55253.639726
2022-05-14 05:25:51.515532 | rdo-centos-stream |
2022-05-14 05:25:51.515538 | rdo-centos-stream | nothing added to commit but untracked files present (use "git add" to track)
2022-05-14 05:25:51.516428 | rdo-centos-stream | ERROR: Git reported dirty status. Git should never report dirty status at the end of testing, regardless if status is passed, failed or aborted.
~~~

[Sandeep Yadav (sandeepyadav93)]

Adding .coverage.hostname.number.number in .gitignore

[1] https://review.rdoproject.org/r/c/rdo-infra/ci-config/+/42841