[python] Fix calls to externals from snowball code
[python] Fix calls to externals from snowball code

snowballstem/snowball,snowballstem/snowball,snowballstem/snowball,kariminf/snowball,JDemler/snowball,JDemler/snowball,cesarsouza/snowball,assem-ch/snowball,assem-ch/snowball,kariminf/snowball,snowballstem/snowball,kariminf/snowball,snowballstem/snowball,cesarsouza/snowball,snowballstem/snowball,JDemler/snowball,cesarsouza/snowball,JDemler/snowball,cesarsouza/snowball,assem-ch/snowball,cesarsouza/snowball,cesarsouza/snowball,snowballstem/snowball,snowballstem/snowball,JDemler/snowball,kariminf/snowball,assem-ch/snowball,kariminf/snowball,assem-ch/snowball,cesarsouza/snowball,JDemler/snowball