BUG: Internal factory must use RegisterFactoryInternal method

If just RegisterFactory is called to register an internal factory,
this will cause the dynamic libraries to be loaded during static
initialization. This is undesired behavior and may cause a race
condition of shared libraries loading other shared libraries.

Additionally, applications have been setting ITK_AUTOLOAD path during
executing, before any object were created or other objects
registered. This patch restores the behavior of the dynamic libraries
being loaded with this usage.

Change-Id: I88433ba6e0bcc1885c5e11a54307d0e6c481f85e

Author: blowekamp

Modules/IO/TransformHDF5/include/itkHDF5TransformIOFactory.h

@@ -54,7 +54,7 @@ class HDF5TransformIOFactory:public ObjectFactoryBase
   {
     HDF5TransformIOFactory::Pointer metaFactory = HDF5TransformIOFactory::New();
 
-    ObjectFactoryBase::RegisterFactory(metaFactory);
+    ObjectFactoryBase::RegisterFactoryInternal(metaFactory);
   }
 
 protected:

Modules/IO/TransformInsightLegacy/include/itkTxtTransformIOFactory.h

@@ -53,7 +53,7 @@ class ITK_EXPORT TxtTransformIOFactory:public ObjectFactoryBase
   {
     TxtTransformIOFactory::Pointer metaFactory = TxtTransformIOFactory::New();
 
-    ObjectFactoryBase::RegisterFactory(metaFactory);
+    ObjectFactoryBase::RegisterFactoryInternal(metaFactory);
   }
 
 protected:

Modules/IO/TransformMatlab/include/itkMatlabTransformIOFactory.h

@@ -55,7 +55,7 @@ class ITK_EXPORT MatlabTransformIOFactory:public ObjectFactoryBase
     MatlabTransformIOFactory::Pointer metaFactory =
       MatlabTransformIOFactory::New();
 
-    ObjectFactoryBase::RegisterFactory(metaFactory);
+    ObjectFactoryBase::RegisterFactoryInternal(metaFactory);
   }
 
 protected:

Modules/Nonunit/Review/include/itkMRCImageIOFactory.h

@@ -69,7 +69,7 @@ class ITK_EXPORT MRCImageIOFactory:public ObjectFactoryBase
   {
     MRCImageIOFactory::Pointer vtkFactory = MRCImageIOFactory::New();
 
-    ObjectFactoryBase::RegisterFactory(vtkFactory);
+    ObjectFactoryBase::RegisterFactoryInternal(vtkFactory);
   }
 
 protected: