fixes for parameter scan functionality

[bendavid]

Fixes some simple, but critical issues with the lhe parameter scan functionality.
(Mainly adding a maximum value for the random seed, which otherwise can cause madgraph to crash.)

[cmsbuild]

A new Pull Request was created by @bendavid (Josh Bendavid) for CMSSW_8_1_X.

It involves the following packages:

GeneratorInterface/Core

@cmsbuild, @covarell, @govoni, @thuer, @davidlange6 can you please review it and eventually sign? Thanks.
@agrohsje, @mkirsano 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

[bendavid]

please test

[lgray]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/12277/console

[covarell]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_1_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: aef91a4
When I ran the RelVals I found an error in the following worklfows:
1001.0 step3

runTheMatrix-results/1001.0_RunMinBias2011A+RunMinBias2011A+TIER0EXP+ALCAEXP+ALCAHARVD1+ALCAHARVD2+ALCAHARVD3+ALCAHARVD4/step3_RunMinBias2011A+RunMinBias2011A+TIER0EXP+ALCAEXP+ALCAHARVD1+ALCAHARVD2+ALCAHARVD3+ALCAHARVD4.log

you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14005/12277/summary.html

[davidlange6]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/12285/console

[cmsbuild]

+1
Tested at: aef91a4
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14005/12285/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14005/12285/summary.html

[davidlange6]

+1