python39Packages.zeroc-ice: add import check

pkgs/development/python-modules/zeroc-ice/default.nix

···
 
   buildInputs = [ openssl bzip2 ];
 
+  pythonImportsCheck = [ "Ice" ];
+
   meta = with lib; {
     homepage = "https://zeroc.com/";
     license = licenses.gpl2;