Description of problem:
On this page 

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html-single/migrating_instances/#migrate_between_environments_or_projects

Section 2.3.1

Doesn't appear that it is required at all. Right after an OSP install I was able to do a resize VM without these additional steps.

Secondly:
This step is incorrect

 scp /var/lib/nova/.ssh/id_rsa computeNodeAddress:~/
 scp /var/lib/nova/.ssh/id_rsa.pub computeNodeAddress:~/

This can only be done if root password is known on the compute nodes.

Version-Release number of selected component (if applicable):


How reproducible:
100%

Steps to Reproduce:
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Actual results:


Expected results:


Additional info: