COMP: Fix Doxygen warnings in itkMetaDataObject.h.

Fixes:

  ITK/Modules/Core/Common/include/itkMetaDataObject.h:218: warning:
  documentation for unknown define NATIVE_TYPE_METADATAPRINT found.

  ITK/Modules/Core/Common/include/itkMetaDataObject.h:113: warning: argument
  'NewValue' of command @param is not found in the argument list of
  itk::MetaDataObject< MetaDataObjectType >::SetMetaDataObjectValue(const
  MetaDataObjectType &newValue)

Change-Id: I03a71ecbd20bbcb0bc09e8103bcfd84833a35adc
Merge topic 'doxygen'

45627e1c COMP: Fix Doxygen warnings in itkMetaDataObject.h.