Log Message:
py-zanata-python-client: update to 1.5.3.

* Fri Mar 08 2019 Sundeep Anand <suanand@redhat.com> - 1.5.3
- ZNTA-2791 - Port Zanata Python client to Python 3

* Mon Apr 16 2018 Sundeep Anand <suanand@redhat.com> - 1.5.2
- ZNTA-1390 - Python client fuzzies my strings
- ZNTA-1382 - Should "--push-trans-only" be deprecated in the python \ 
client?

* Wed Oct 26 2016 Sundeep Anand <suanand@redhat.com> - 1.5.1
- Bug 1368381 - download only those which have translations
- ZNTA-106 - zanata-python-client installs a test module