Use python3 in cmsRun in DEVEL build

[davidlange6]

PR description:

swap python2 and python3 linking in FWCore/Py*ParameterSet to allow test in DEVEL build [most likely to be reverted after one night]

PR validation:

one runTheMatrix workflow works correctly (runs).

[cmsbuild]

A new Pull Request was created by @davidlange6 (David Lange) for CMSSW_10_6_DEVEL_X.

It involves the following packages:

FWCore/Framework
FWCore/PyDevParameterSet
FWCore/PythonParameterSet

@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

[Dr15Jones]

please test

[Dr15Jones]

+1

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_10_6_DEVEL_X IBs after it passes the integration tests.

[cmsbuild]

-1
Tested at: UNKNOWN
I was not able to find a release to test this PR. See the Jenkins logs for more details.

[davidlange6]

i will make a pr against master for testing purposes.

…

On Apr 9, 2019, at 2:19 PM, Chris Jones ***@***.***> wrote: please test — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[cmsbuild]

Pull request #26401 was updated. @cmsbuild, @smuzaffar, @Dr15Jones can you please check and sign again.

[davidlange6]

the tests went well enough that a DEVEL build is of interest.