Installing primary control plane node on healthy cluster

Steps 4i and 4iii have the following structure:

Create manifest file:

apiVersion: metal3.io/v1alpha1
kind: BareMetalHost 

$ oc create -f <filename>

These are 2 distinct steps:

1. Create a 'baremetalhost.yaml' manifest file according to the following example:
   [YAML file]
2. Update the bare metal host by running the following command:

$ oc apply -f baremetalhost.yaml

Note the command. "oc apply", not "oc create". If you use 'oc create' for a resource that already exists, like the BareMetalHost object, you will get an error. It is safer to use 'oc apply' unless you know for certain that the resource does not exist. See this blog for a summary.

Update: 4iii is 'oc create' and 4iv is 'oc apply'.  This repetition needs to be fixed.