Allow a modification to depend on multiple Modifiers

[Dr15Jones]

Allow a configuration modification to only be applied if multiple Modifiers have been chosen. This is done using the '&' operator to join all the required Modifiers.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_8_0_X.

It involves the following packages:

FWCore/ParameterSet

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

cms-bot commands are list here #13028

[Dr15Jones]

please test

[Dr15Jones]

+1

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/10853/console

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs after it passes the integration tests. This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[cmsbuild]

-1

Tested at: 544dc71
I found errors in the following unit tests:

---> test runtestRecoLocalCaloHGCalRecProducers had ERRORS
---> test testRecoMETMETProducers had ERRORS
---> test testPythonParameterSet had ERRORS
---> test DetectorDescriptionRegressionTestDOMCount had ERRORS
---> test runtestSimCalorimetryHGCalSimProducers had ERRORS

you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13132/10853/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
81a912b
471f6c6
5bc0097
dd3d2c4
4d57087
227e959
a11d0ac
40bea38
c057e65
3e850ff
840efb4
c0ebb2a
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13132/10853/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13132/10853/git-merge-result

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13132/10853/summary.html

[Dr15Jones]

The unit tests failures were not caused by this pull request. Even the one from FWCore/ParameterSet is from a FileInPath failure which could not be caused by this change.