automatically drop LHEXMLStringProduct on input from cmsDriver

[bendavid]

Drops on input automatically the LHEXMLStringProduct whenever the GEN step is run with an input file. (Saves memory which would be used to read the large run product that should only be saved in the initial LHE output step)

Added bonus: ConfigBuilder is now smart enough to simply do nothing in case inputCommands are passed but there is no input file. (May add flexibility in mcm handling of additional inputCommands in the future)

[cmsbuild]

A new Pull Request was created by @bendavid (Josh Bendavid) for CMSSW_7_5_X.

automatically drop LHEXMLStringProduct on input from cmsDriver

It involves the following packages:

Configuration/Applications

@cmsbuild, @franzoni, @nclopezo, @davidlange6 can you please review it and eventually sign? Thanks.
@ghellwig, @Martin-Grunewald this is something you requested to watch as well.
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@nclopezo you are the release manager for this.
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[ghost]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

-1
Tested at: 40c709f
The relvals timed out after 1 hour.

you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8459/235/summary.html

[cmsbuild]

+1
Tested at: 40c709f
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8459/3738/summary.html

[cmsbuild]

+1
Tested at: 40c709f
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8459/2511/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8459/2511/summary.html