COMP: Build elastix at azure CI with the tagged ITK 4.13.2
COMP: Build elastix at azure CI with the tagged ITK 4.13.2

Now using the last tagged version of ITK 4.13, for continuous integration.

Note that support for ITK4 will soon be dropped.

SuperElastix/elastix,SuperElastix/elastix,SuperElastix/elastix,SuperElastix/elastix,SuperElastix/elastix