clean up namespace usage. Fix for CID 1054792

This should satisfy #179 CID 1054792 (Medium) Uninitialized scalar field (UNINIT_CTOR) 

@luizirber or @camillescott, please review 

- [x] Is it mergable
- [x] Did it pass the tests?
- [x] If it introduce new functionality in scripts/ is it tested? Check for code coverage
- [x] Is it well formatted? Look at `pep8`/`pylint` and `cppcheck` output. Use `autopep8` and `astyle -A10` if needed. 
- [x] Is it documented in the Changelog?