Backport some ISF_FastCaloSimEvent fixes from master

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimEvent/ISF_FastCaloSimEvent/TFCS1DFunctionHistogram.h

 /*
-  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef ISF_FASTCALOSIMEVENT_TFCS1DFunctionHistogram_h
@@ -33,13 +33,13 @@ class TFCS1DFunctionHistogram:public TFCS1DFunction
     double  sample_from_histo(TH1* hist, double);
     double  sample_from_histovalues(double);
 
-    vector<float> get_HistoBorders() {return m_HistoBorders;};
-    vector<float> get_HistoContents()  {return m_HistoContents;};
+    std::vector<float> get_HistoBorders() {return m_HistoBorders;};
+    std::vector<float> get_HistoContents()  {return m_HistoContents;};
 
   protected:
 
-    vector<float> m_HistoBorders;
-    vector<float> m_HistoContents;
+    std::vector<float> m_HistoBorders;
+    std::vector<float> m_HistoContents;
 
   ClassDef(TFCS1DFunctionHistogram,1)  //TFCS1DFunctionHistogram
 

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimEvent/ISF_FastCaloSimEvent/TFCS1DFunctionRegression.h

 /*
-  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef ISF_FASTCALOSIMEVENT_TFCS1DFunctionRegression_h
@@ -10,7 +10,6 @@
 #include "TH1.h"
 #include <vector>
 
-using namespace std;
 
 class TFCS1DFunctionRegression:public TFCS1DFunction
 {
@@ -22,13 +21,13 @@ class TFCS1DFunctionRegression:public TFCS1DFunction
     using TFCS1DFunction::rnd_to_fct;
     virtual double rnd_to_fct(double rnd) const;
     double  regression_value(double uniform) const;
-    void    set_weights(vector<vector<double> > fWeightMatrix0to1, vector<vector<double> > fWeightMatrix1to2);
+    void    set_weights(std::vector<std::vector<double> > fWeightMatrix0to1, std::vector<std::vector<double> > fWeightMatrix1to2);
     double  sigmoid(double) const;
 
   private:
 
-    vector<vector<double> > m_fWeightMatrix0to1;
-    vector<vector<double> > m_fWeightMatrix1to2;
+    std::vector<std::vector<double> > m_fWeightMatrix0to1;
+    std::vector<std::vector<double> > m_fWeightMatrix1to2;
 
 
   ClassDef(TFCS1DFunctionRegression,1)  //TFCS1DFunctionRegression

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimEvent/ISF_FastCaloSimEvent/TFCS1DFunctionRegressionTF.h

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
 #ifndef ISF_FASTCALOSIMEVENT_TFCS1DFunctionRegressionTF_h
@@ -23,8 +23,8 @@ class TFCS1DFunctionRegressionTF:public TFCS1DFunctionRegression
 
   private:
 
-    vector<vector<double> > m_fWeightMatrix0to1;
-    vector<vector<double> > m_fWeightMatrix1to2;
+    std::vector<std::vector<double> > m_fWeightMatrix0to1;
+    std::vector<std::vector<double> > m_fWeightMatrix1to2;
     float m_rangeval;
     float m_startval;
 

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimEvent/src/TFCS1DFunctionHistogram.cxx

 /*
-  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
-using namespace std;
 #include "ISF_FastCaloSimEvent/TFCS1DFunctionHistogram.h"
 #include "TMath.h"
 #include "TFile.h"
 #include <iostream>
+using namespace std;
 
 //=============================================
 //======= TFCS1DFunctionHistogram =========

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimEvent/src/TFCS1DFunctionRegressionTF.cxx

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
-using namespace std;
 #include "ISF_FastCaloSimEvent/TFCS1DFunctionRegressionTF.h"
 #include "TFile.h"
 #include "TString.h"
 #include "TMath.h"
+using namespace std;
 
 
 //=============================================