Update configurable property syntax in BeamHaloGenerator, CavernBkgGenerator and CosmicGenerator packages

No change in output expected.

(These changes were initially made as part of !58216 (merged), but were postponed until after the random seeding changes had gone through.)

Tagging @ewelina.

Generators/BeamHaloGenerator/BeamHaloGenerator/BeamHaloGeneratorAlg.h

@@ -26,7 +26,7 @@ class BeamHaloGenerator;
 class BeamHaloGeneratorAlg : public GenModule {
 public:
   BeamHaloGeneratorAlg(const std::string& name, ISvcLocator *svcLocator);
-  virtual ~BeamHaloGeneratorAlg();
+  virtual ~BeamHaloGeneratorAlg() = default;
   virtual StatusCode genInitialize();
   virtual StatusCode genFinalize();
 
@@ -44,45 +44,45 @@ private:
 
   /** Input file type and therefore associated beam halo generator
       that should be used. */
-  std::string m_inputTypeStr;
+  StringProperty m_inputTypeStr{this, "inputType", "MARS-NM"};
   
   /** Input file name */
-  std::string m_inputFile;
+  StringProperty m_inputFile{this, "inputFile", "bgi-b2l1.1"};
   
   /** The position of the interface plane in mm. */
-  double m_interfacePlane;
+  DoubleProperty m_interfacePlane{this, "interfacePlane", 20850.0}; // (mm)
   
   /** Flag for flipping event */
-  bool m_enableFlip;
+  BooleanProperty m_enableFlip{this, "enableFlip", false};
   
   /** Flip probability */
-  float m_flipProbability;
+  FloatProperty m_flipProbability{this, "flipProbability", 0.0};
   
   /** Flag to enable or disable sampling. */
-  bool m_enableSampling;
+  BooleanProperty m_enableSampling{this, "enableSampling", false};
   
   /** The name of the binary buffer file, needed for sampling from a
       converted file. */
-  std::string m_bufferFileName;
+  StringProperty m_bufferFileName{this, "bufferFileName", "BinaryBuffer.bin"};
   
   /** A vector of strings defining generator settings. */
-  std::vector<std::string> m_generatorSettings;
+  StringArrayProperty m_generatorSettings{this, "generatorSettings", {}, "A set of cuts to be applied to generated particles."};
   
   /** A flag to allow monitoring plots to be turned on or off. */
-  bool m_doMonitoringPlots;
+  BooleanProperty m_doMonitoringPlots{this, "doMonitoringPlots", false};
   
   /** A pointer to the THist service for validation plots. */
-  ITHistSvc *m_tHistSvc;
+  ITHistSvc *m_tHistSvc{};
   
   /** Name of the random number stream */
-  std::string m_randomStream;
+  StringProperty m_randomStream{this, "randomStream", "BeamHalo"};
   
   /** A pointer to the beam halo generator */
-  BeamHaloGenerator *m_beamHaloGenerator;
+  BeamHaloGenerator *m_beamHaloGenerator{};
 
   /** An empty GenEvent to cache the generate output between
       callGenerator and fillEvt. */
-  HepMC::GenEvent m_evt;
+  HepMC::GenEvent m_evt{};
 
   enum validationPlotsEnum {
     PRI_R,