Install and configure the controller node for Red Hat Enterprise Linux and CentOS in swift

[Vadim Razin]

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:

- [ ] This doc is inaccurate in this way: ______
- [ ] This is a doc addition request.
- [x] I have a fix to the document that I can paste below including example: input and output.

In section about configuring file /etc/swift/proxy-server.conf
need to replace "auth_url = http://controller:35357" with "auth_url = http://controller:5000"

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-----------------------------------
Release: 2.19.2.dev1 on 2019-03-22 22:21
SHA: 2e7e0bd4be5687100543818854df928ca08bd638
Source: https://git.openstack.org/cgit/openstack/swift/tree/doc/source/install/controller-install-rdo.rst
URL: https://docs.openstack.org/swift/rocky/install/controller-install-rdo.html