message: add test for v2 .gm
diff: @@ -105,6 +105,7 @@ int main()
  test_file( "modelA1_version0.gm" );
  test_file( "modelA1_version1.gm" );
  + test_file( "modelA1_version2.gm" );
  } catch( const RINGMeshException& e ) {
  Logger::err( e.category(), e.what() );
  