add originalXWGTUP() to LHEEvent and LHEEventProduct

[lgray]

Add some book-keeping information to LHEEvent and LHEEventProduct so that reweighting is less cumbersome.

In the MG5 scheme, users can now do raw_ME_ratio[i] = eventInfo->weights()[i]/eventInfo->originalXWGTUP();

To get the raw matrix element ratio.

I have checked that this is stored correctly by writing out the LHE file that was read in.
The XWGTUP parameters matched exactly.

[cmsbuild]

A new Pull Request was created by @lgray (Lindsey Gray) for CMSSW_7_1_X.

add originalXWGTUP() to LHEEvent and LHEEventProduct

It involves the following packages:

GeneratorInterface/LHEInterface
SimDataFormats/GeneratorProducts

@vciulli, @cmsbuild, @Degano, @bendavid, @nclopezo can you please review it and eventually sign? Thanks.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
@ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[cmsbuild]

-1
I found an error when building:

>> Compiling  /build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/ReggeGribovPartonMCInterface/src/read.cc 
>> Compiling  /build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/ReggeGribovPartonMCInterface/src/models.F 
>> Compiling  /build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/ReggeGribovPartonMCInterface/src/crmc-aaa.f 
>> Compiling  /build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/ReggeGribovPartonMCInterface/src/epos-bas.f 
/build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/MCatNLOInterface/plugins/MCatNLOSource.cc: In member function 'virtual void MCatNLOSource::produce(edm::Event&)':
/build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/MCatNLOInterface/plugins/MCatNLOSource.cc:189:68: error: no matching function for call to 'LHEEventProduct::LHEEventProduct(lhef::HEPEUP&)'
   std::auto_ptr lhEvent(new LHEEventProduct(hepeup));
                                                                    ^
/build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/MCatNLOInterface/plugins/MCatNLOSource.cc:189:68: note: candidates are:
In file included from /build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/LHEInterface/interface/LHEEvent.h:19:0,
                 from /build/cmsbuild/jenkins-workarea/workspace/Pull-Request-Integration-7_1_X@4/ARCHITECTURE/slc5_amd64_gcc481/CMSSW_7_1_X_2014-01-21-0200/src/GeneratorInterface/MCatNLOInterface/plugins/MCatNLOSource.cc:18:


you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2097/19/summary.html

[lgray]

Will fix it in just a bit and update related PRs.

[lgray]

Fixed and changes propagated to all flavors of the commits.

[cmsbuild]

Pull request #2097 was updated. @vciulli, @cmsbuild, @Degano, @bendavid, @nclopezo can you please check and sign again.

[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2097/24/summary.html

[vciulli]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes (tests are also fine). @ktf can you please take care of it?