Fix Focal on Jenkins

[chapulina]

🦟 Bug fix

• Alternative to Add python3-distutils to IGN_MATH_DEPENDENCIES gazebo-tooling/release-tools#621
• Broken off Refactor finding pybind11 #360

Summary

ign-math builds have been failing on Jenkins since we migrated to Focal in gazebo-tooling/release-tools#565

As @j-rivero found out, adding the python3-distutils dependency fixes the build.

I haven't looked into why this extra dependency is needed by Jenkins but not by GitHub actions, which has been successfully building Python bindings without this dependency on Focal.

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)
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[codecov]

Codecov Report

Merging #364 (7afd1d3) into ign-math6 (1c4a9f7) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           ign-math6     #364   +/-   ##
==========================================
  Coverage      99.65%   99.65%           
==========================================
  Files             67       67           
  Lines           6380     6380           
==========================================
  Hits            6358     6358           
  Misses            22       22           

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[mjcarroll]

I haven't looked into why this extra dependency is needed by Jenkins but not by GitHub actions, which has been successfully building Python bindings without this dependency on Focal.

We are installing it, because python3-pip depends on python3-distutils https://github.com/ignition-tooling/action-ignition-ci/blob/master/entrypoint.sh#L25

[chapulina]

We are installing it, because python3-pip depends on python3-distutils

Ahhh sneaky! Thanks for that, glad that Jenkins caught the missing dependency!

[osrf-triage]

This pull request has been mentioned on Gazebo Community. There might be relevant details there:

https://community.gazebosim.org/t/new-ignition-releases-2022-03-01-citadel-edifice-fortress/1313/1