openSUSE leap python3.6 incompatible with python3-pip

There is a rather interesting issue with Leap 42.2 worth separately raising.

After pinning Python 3.6 (https://github.com/coala/docker-coala-base/pull/222), and using the Python Factory repo, we run into [this beauty](https://travis-ci.org/coala/docker-coala-base/builds/259197379#L706):

```
Problem: python3-3.6.1-180.1.x86_64 requires python(abi) = 3.6, but this requirement cannot be provided
uninstallable providers: python3-base-3.6.1-186.1.x86_64[~plus-repo-5]
Solution 1: Following actions will be done:
do not install python3-3.6.1-180.1.x86_64
do not install python3-dbm-3.6.1-180.1.x86_64
do not install python3-devel-3.6.1-186.1.x86_64
Solution 2: do not install python3-pip-7.1.2-7.1.noarch
Solution 3: break python3-3.6.1-180.1.x86_64 by ignoring some of its dependencies
```

Start with the Python 3.6 pinning change in pull request 222 and the linked Travis CI build around line 706. Reproduce the openSUSE Leap 42.2 dependency resolution involving python3, python3-base, and python3-pip; done means the base image can install the intended Python and pip packages together.

Written by the indexing model from the issue text.