Backport of assorted fixes: process-prune-method and TriggerSummaryProducerAOD

[Martin-Grunewald]

Backport of Chris's #8828,
additional improvements in Config.py,
and improved error handling in TriggerSummaryProducerAOD

[cmsbuild]

A new Pull Request was created by @Martin-Grunewald (Martin Grunewald) for CMSSW_7_4_X.

Backport of assorted fixes: process-prune-method and TriggerSummaryProducerAOD

It involves the following packages:

FWCore/ParameterSet
HLTrigger/HLTcore

@perrotta, @cmsbuild, @Dr15Jones, @Martin-Grunewald, @nclopezo, @fwyzard can you please review it and eventually sign? Thanks.
@wddgit, @wmtan this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@Degano you are the release manager for this.
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[Martin-Grunewald]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[Dr15Jones]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_X IBs unless changes or unless it breaks tests. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[cmsbuild]

-1

Tested at: 4610f4f
I found errors in the following unit tests:

---> test testTechnologyPlugin had ERRORS

you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8929/46/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_X IBs unless changes (but tests are reportedly failing). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

test failures seem unrelated - likely from massive checkdeps that this PR has.. merging and will hope no knock on problems

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8929/46/summary.html