dependecy error in "Install and configure in keystone"

[dasNessie]

This bug tracker is for errors with the documentation, use the following as a template and remove or add fields as you see fit. Convert [ ] into [x] to check boxes:

- [x] This doc is inaccurate in this way: The docs (https://docs.openstack.org/keystone/stein/install/keystone-install-ubuntu.html) say to run 'apt install keystone apache2 libapache2-mod-wsgi', but keystone depends on libapache2-mod-wsgi-py3, which conflicts with libapache2-mod-wsgi.
- [ ] This is a doc addition request.
- [ ] I have a fix to the document that I can paste below including example: input and output.

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-----------------------------------
Release: on 2018-12-10 15:55:13
SHA: 1828d0612cf2c51427773077dc25bd8b659eb549
Source: https://opendev.org/openstack/keystone/src/doc/source/install/keystone-install-ubuntu.rst
URL: https://docs.openstack.org/keystone/stein/install/keystone-install-ubuntu.html