Fix for importing ClassesDefXmlUtils

[smuzaffar]

This change allows to import ClassesDefXmlUtils while building patch release where python path is not set during build phase.
This change allows to build patch releases without the fix in the cmsdist. This should be backported to 14.1.X and 14.2.X so that we can build patch releases for those release cycles if needed.
I will fix the build recipe (cmsdist / cmssw-config) for 14.1.X and above but that will only go in the next full build.

[cmsbuild]

cms-bot internal usage

[smuzaffar]

test parameters:

• addpkg = DataFormats/Common

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-46919/42983

[cmsbuild]

A new Pull Request was created by @smuzaffar for master.

It involves the following packages:

• FWCore/Reflection (core)

@Dr15Jones, @cmsbuild, @makortel, @smuzaffar can you please review it and eventually sign? Thanks.
@makortel, @missirol, @wddgit this is something you requested to watch as well.
@antoniovilela, @mandrenguyen, @rappoccio, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[smuzaffar]

please test

[cmsbuild]

+1

Size: This PR adds an extra 16KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-57e0db/43403/summary.html
COMMIT: d20d9a4
CMSSW: CMSSW_15_0_X_2024-12-11-2300/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/46919/43403/install.sh to create a dev area with all the needed externals and cmssw changes.

• DAS Queries: The DAS query tests failed, see the summary page for details.

Comparison Summary

Summary:

• You potentially removed 2 lines from the logs
• Reco comparison results: 149 differences found in the comparisons
• DQMHistoTests: Total files compared: 46
• DQMHistoTests: Total histograms compared: 3510017
• DQMHistoTests: Total failures: 5231
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3504766
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 45 files compared)
• Checked 202 log files, 172 edm output root files, 46 DQM output files
• TriggerResults: found differences in 1 / 44 workflows

[makortel]

Comparison differences are related to #39803 and #46416

[makortel]

+core

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @mandrenguyen, @antoniovilela, @rappoccio, @sextonkennedy (and backports should be raised in the release meeting by the corresponding L2)

[mandrenguyen]

+1