added empty set_initialization to templates

...stups/codegenerator/generators/SubstitutionGenerator.java

src/main/resources/de/hhu/stups/codegenerator/CTemplate.stg

.../resources/de/hhu/stups/codegenerator/ClojureTemplate.stg

...main/resources/de/hhu/stups/codegenerator/CppTemplate.stg

...ain/resources/de/hhu/stups/codegenerator/JavaTemplate.stg

...n/resources/de/hhu/stups/codegenerator/PrologTemplate.stg

...n/resources/de/hhu/stups/codegenerator/PythonTemplate.stg

src/main/resources/de/hhu/stups/codegenerator/TsTemplate.stg