[PY3] Set PYTHONHOME to python2 to fix PyDevParameterSet unittest

[smuzaffar]

This shoudl fix the PY3 IB unit test for FWCore/PyDevParameterSet. For PY3 IBs , PyDevParameterSet is linked to python2 but python executable points to python3 this make pybind11 to fail as it tries to look for python2 shared libs under python3/lib path.

This change will only set PYTHONHOME to python2 path for PY3 IBs.

[smuzaffar]

please test

[cmsbuild]

The code-checks are being triggered in jenkins.

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-28317/12559

• This PR adds an extra 12KB to repository

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-run-pr-tests/3273/console Started: 2019/10/30 18:14

[cmsbuild]

A new Pull Request was created by @smuzaffar (Malik Shahzad Muzaffar) for master.

It involves the following packages:

FWCore/PyDevParameterSet

@cmsbuild, @smuzaffar, @Dr15Jones can you please review it and eventually sign? Thanks.
@makortel, @Martin-Grunewald, @wddgit this is something you requested to watch as well.
@davidlange6, @slava77, @fabiocos you are the release manager for this.

cms-bot commands are listed here

[cmsbuild]

+1
Tested at: aff1edc
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13cb6c/3273/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13cb6c/3273/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 34
• DQMHistoTests: Total histograms compared: 2961036
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2960694
• DQMHistoTests: Total skipped: 341
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 33 files compared)
• Checked 147 log files, 16 edm output root files, 34 DQM output files

[smuzaffar]

@fabiocos , can we get this in IB, this just fixes a unit test for PY3 IBs.

[smuzaffar]

+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. @davidlange6, @slava77, @smuzaffar, @fabiocos (and backports should be raised in the release meeting by the corresponding L2)

[fabiocos]

@smuzaffar this looks as a temporary workaround right?

[fabiocos]

+1

to be verified in next IB

[smuzaffar]

correct, this is just to workaround for py3. Once we full move to py3 then the package PyDevParameterSet will be removed