Fix template generation with Python 3.x
Fix template generation with Python 3.x

goldmann/dogen,jboss-container-images/concreate,jboss-container-images/concreate,jboss-dockerfiles/dogen,jboss-dockerfiles/dogen,jboss-dockerfiles/dogen,goldmann/dogen,jboss-container-images/concreate,goldmann/dogen