Update python-marathon to rev 6 via SR 834882
https://build.opensuse.org/request/show/834882
by user dirkmueller + dimstar_suse
- update to 0.13.0:
- about view one instance app logs real time
- Fix deserialization for Deploment model
- Local tests no longer need docker-compose and rely on "mini-marathon"
- Adding support for v1.10.19
- Updates for Marathon 1.9.109
- Fix return value for kill\_given\_tasks.
- Bump requests from 2.11.1 to 2.20.0