Description of problem:
When enable s3 backend storage in 3.2 installation, it's not correct that repository section was in the same level as middleware.

Version-Release number of selected component (if applicable):
openshift-ansible-3.2.24-1.git.0.337259b.el7.noarch.rpm

How reproducible:
always

Steps to Reproduce:
1.Trigger a 3.2 installation which enables s3 backend storage as docker-reigstry
2.
3.

Actual results:
sh-4.2$ cat /etc/registryconfig/config.yml
<--snip-->
auth:
  openshift:
    realm: openshift
middleware:
repository:
  - name: openshift
    options:
      pullthrough: True


Expected results:
sh-4.2$ cat /etc/registryconfig/config.yml
<--snip-->
auth:
  openshift:
    realm: openshift
middleware:
  repository:
  - name: openshift
    options:
      pullthrough: True


Additional info:
Waiting for PR merged to 3.2: 
https://github.com/openshift/openshift-ansible/pull/2314