Fix faulty assumption in INTEGRATION_log_system

[mjcarroll]

🦟 Bug fix

Fixes #

Summary

I believe that gazebosim/gz-common#332 uncovered a faulty assumption in the log recorder test. ignLogDirectory should not be empty, it should be initialized to .ignition if the console logger is not properly initialized. This adjusts the assumption to be correct.

I've seen this pop up in CI (https://build.osrfoundation.org/job/ignition_gazebo-ci-pr_any-ubuntu_auto-amd64/8397/testReport/junit/(root)/LogSystemTest/LogDefaults/) and can reproduce locally on the main branch.

Checklist

• Signed all commits for DCO
• Added tests
• 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 and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #1426 (e04f88b) into main (f6ba375) will decrease coverage by 0.01%.
The diff coverage is 14.81%.

@@            Coverage Diff             @@
##             main    #1426      +/-   ##
==========================================
- Coverage   62.34%   62.32%   -0.02%     
==========================================
  Files         317      317              
  Lines       24419    24418       -1     
==========================================
- Hits        15224    15219       -5     
- Misses       9195     9199       +4     

Impacted Files	Coverage Δ
.../gui/plugins/transform_control/TransformControl.cc	7.36% <ø> (+0.01%)	⬆️
...lization_capabilities/VisualizationCapabilities.cc	3.66% <0.00%> (ø)
src/rendering/RenderUtil.cc	36.94% <0.00%> (ø)
src/systems/contact/Contact.hh	100.00% <ø> (ø)
src/systems/particle_emitter/ParticleEmitter.cc	55.40% <0.00%> (ø)
src/systems/scene_broadcaster/SceneBroadcaster.hh	100.00% <ø> (ø)
src/systems/thruster/Thruster.cc	92.30% <ø> (-0.06%)	⬇️
...ems/collada_world_exporter/ColladaWorldExporter.hh	100.00% <100.00%> (ø)
...ems/kinetic_energy_monitor/KineticEnergyMonitor.hh	100.00% <100.00%> (ø)
src/systems/user_commands/UserCommands.hh	100.00% <100.00%> (ø)
... and 4 more

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[Blast545]

This error is happening on gazebo3 (Citadel) as well, requires a backport, see:

https://build.osrfoundation.org/job/ignition_gazebo-ci-ign-gazebo3-focal-amd64/19/testReport/
and
https://build.osrfoundation.org/job/ignition_gazebo-ci-ign-gazebo3-homebrew-amd64/211/testReport/