👩‍🌾 Print Qt plugin debug messages on Actions

[chapulina]

Summary

This should make test runs in GitHub actions more verbose. I hope the extra information will help decipher what's happening on #58.

There's a change the new messages pollute the test results, because it outputs a lot of stuff. Considering that this is being enabled only for Actions, but not on Jenkins, I think it's not too bad.

Test it

See GitHub actions output.

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge

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https://github.com/osrf/buildfarmer/issues/181

[codecov]

Codecov Report

Merging #211 (8acb9da) into ign-gui3 (064f815) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           ign-gui3     #211   +/-   ##
=========================================
  Coverage     59.03%   59.03%           
=========================================
  Files            23       23           
  Lines          2739     2739           
=========================================
  Hits           1617     1617           
  Misses         1122     1122           

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[chapulina]

Ha, interestingly, the flaky failure happened and that test case didn't have any extra debug output 😬

2021-04-22T00:45:17.5540977Z [ RUN      ] HelpersTest.worldNames
2021-04-22T00:45:17.5542514Z �[1;31m[GUI] [Err] [Application.cc:653] �[0m�[1;31m[QT] This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

[chapulina]

I'll close this because it adds clutter and doesn't shed a light into the flaky tests.