Add test label for language
Add test label for language

Adding ctest property to for each (non-C++) language test via the
centralized macros. This enable only tests for certain languages to be
run.

kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix