Bug#912574: missing autopkg test dependency

[Matthias Klose]

Package: src:python-cobra
Version: 0.13.4-1
Severity: important
Tags: sid buster patch

missing autopkg test dependency, causing the tests to fail. patch at
http://launchpadlibrarian.net/395586937/python-cobra_0.13.4-1_0.13.4-1ubuntu1.diff.gz