WIP: Enable Pythia8 CI jobs

Includes some additional fixes to the Pythia8 code.

Examples/Fatras/Pythia8/FatrasPythia8.cpp

@@ -9,10 +9,12 @@
 /// @file
 /// @brief Fatras example with a pythia8 generator and the generic detector
 
-#include <ACTS/Detector/TrackingGeometry.hpp>
-#include <ACTS/Utilities/Units.hpp>
 #include <boost/program_options.hpp>
 #include <cstdlib>
+
+#include <ACTS/Detector/TrackingGeometry.hpp>
+#include <ACTS/Utilities/Units.hpp>
+
 #include "ACTFW/Framework/StandardOptions.hpp"
 #include "ACTFW/GenericDetector/BuildGenericDetector.hpp"
 #include "ACTFW/Plugins/BField/BFieldOptions.hpp"
@@ -59,8 +61,14 @@ main(int argc, char* argv[])
   std::string outputDir = "";
   // read and create the magnetic field
   auto bField = FW::Options::readBField<po::variables_map>(vm);
+  // Create the random number engine
+  auto randomNumbersCfg
+      = FW::Options::readRandomNumbersConfig<po::variables_map>(vm);
+  auto randomNumbers = std::make_shared<FW::RandomNumbersSvc>(randomNumbersCfg);
   // now read the pythia8 configs
   auto pythia8Configs = FW::Options::readPythia8Config<po::variables_map>(vm);
+  pythia8Configs.first.randomNumbers  = randomNumbers;
+  pythia8Configs.second.randomNumbers = randomNumbers;
   // the hard scatter generator
   auto hsPythiaGenerator = std::make_shared<FW::GPythia8::Generator>(
       pythia8Configs.first,
@@ -69,10 +77,6 @@ main(int argc, char* argv[])
   auto puPythiaGenerator = std::make_shared<FW::GPythia8::Generator>(
       pythia8Configs.second,
       Acts::getDefaultLogger("PileUpPythia8Generator", logLevel));
-  // Create the random number engine
-  auto randomNumbersCfg
-      = FW::Options::readRandomNumbersConfig<po::variables_map>(vm);
-  auto randomNumbers = std::make_shared<FW::RandomNumbersSvc>(randomNumbersCfg);
   // Create the barcode service
   FW::BarcodeSvc::Config barcodeSvcCfg;
   auto                   barcodeSvc = std::make_shared<FW::BarcodeSvc>(