Rename init function of PyROOT

Eliminate previous redundancy with namespace.

bindings/pyroot_experimental/PyROOT/src/PyROOTModule.cxx

@@ -89,7 +89,7 @@ extern "C" void initlibROOTPython()
    PyModule_AddObject(gRootModule, (char *)"kSignalSafe", PyInt_FromLong((int)CallContext::kSafe));
 
    // setup PyROOT
-   PyROOT::InitPyROOT();
+   PyROOT::Init();
 
    // signal policy: don't abort interpreter in interactive mode
    CallContext::SetSignalPolicy(gROOT->IsBatch() ? CallContext::kFast : CallContext::kSafe);

bindings/pyroot_experimental/PyROOT/src/PyROOTWrapper.cxx

@@ -35,7 +35,7 @@ static void AddToGlobalScope(const char *label, const char * /* hdr */, TObject
 
 } // unnamed namespace
 
-void PyROOT::InitPyROOT()
+void PyROOT::Init()
 {
    // Initialize and acquire the GIL to allow for threading in ROOT
    PyEval_InitThreads();

bindings/pyroot_experimental/PyROOT/src/PyROOTWrapper.h

@@ -5,7 +5,7 @@
 namespace PyROOT {
 
 // initialize ROOT
-void InitPyROOT();
+void Init();
 
 } // namespace PyROOT