Remove the extra random flat, extend unittest.

Remove the extra random number advance in global end lumi. Extend the
unit test to 50 events.

Author: PhyM73

GeneratorInterface/Core/interface/ConcurrentGeneratorFilter.h

@@ -375,12 +375,10 @@ namespace edm {
   void ConcurrentGeneratorFilter<HAD, DEC>::globalEndLuminosityBlockProduce(LuminosityBlock& lumi,
                                                                             EventSetup const&,
                                                                             gen::GenLumiSummary const* iSummary) const {
-    // Advance the random number generator so next begin lumi starts with new seed
-    Service<RandomNumberGenerator> rng;
-    rng->getEngine(lumi.index()).flat();
 
     lumi.put(std::move(iSummary->lumiInfo_));
   }
+
   template <class HAD, class DEC>
   void ConcurrentGeneratorFilter<HAD, DEC>::streamEndRun(StreamID id, Run const& run, EventSetup const&) const {
     auto rCache = this->runCache(run.index());

GeneratorInterface/Pythia8Interface/test/test_Pythia8ConcurrentGeneratorFilter_WZ_TuneCP5_13TeV-pythia8.sh

@@ -5,7 +5,7 @@ cd ${LOCALTOP}/src
 scram b
 cd ../..
 
-cmsDriver.py Configuration/GenProduction/python/BTV-RunIISummer20UL17GEN-00002-fragment.py --python_filename test_BTV-RunIISummer20UL17GEN-00002_1_cfg.py --eventcontent RAWSIM --customise Configuration/DataProcessing/Utils.addMonitoring --datatier GEN --fileout file:test_BTV-RunIISummer20UL17GEN-00002.root --conditions auto:run2_mc --beamspot Realistic25ns13TeVEarly2017Collision --customise_commands process.source.numberEventsInLuminosityBlock="cms.untracked.uint32(100)" --step GEN --geometry DB:Extended --era Run2_2017 --no_exec --mc -n 10 --nThreads 2 --nConcurrentLumis 0
+cmsDriver.py Configuration/GenProduction/python/BTV-RunIISummer20UL17GEN-00002-fragment.py --python_filename test_BTV-RunIISummer20UL17GEN-00002_1_cfg.py --eventcontent RAWSIM --customise Configuration/DataProcessing/Utils.addMonitoring --datatier GEN --fileout file:test_BTV-RunIISummer20UL17GEN-00002.root --conditions auto:run2_mc --beamspot Realistic25ns13TeVEarly2017Collision --customise_commands process.source.numberEventsInLuminosityBlock="cms.untracked.uint32(10)" --step GEN --geometry DB:Extended --era Run2_2017 --no_exec --mc -n 50 --nThreads 4 --nConcurrentLumis 0
 
 sed -i "s/Pythia8GeneratorFilter/Pythia8ConcurrentGeneratorFilter/g" test_BTV-RunIISummer20UL17GEN-00002_1_cfg.py