keystone dev environment setup document is out of date

[dinesh ketumakha]

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 https://docs.openstack.org/keystone/latest/contributor/set-up-keystone.html is inaccurate in this way:
  1. It mentions python3.6 is required but this doesn't seem to be the case. Maybe it should simply point here ? https://governance.openstack.org/tc/reference/runtimes/
  2. The layout of the document is somewhat confusing as well. It would be helpful to outline the steps clearly in a numbered fashion.
  3. Following the instructions the step : keystone-manage bootstrap command seems to fail with the error below.
  4. keystone-manage db_sync fails with the same error as well.
  5. This command : uwsgi --http 127.0.0.1:5000 --wsgi-file $(which keystone-wsgi-public) : from the above link for running locally seems to be out of date as well. The flag --wsgi-file for one isn't supported anymore.

ERROR keystone sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.plugins:dbcounter

It will be helpful to newcomers to keep this up to date.

[dinesh ketumakha (dinesh9)]

I can take this up myself if someone more familiar can guide me.