[DOCS] Applies edits to the OSA install guide appendix C
[DOCS] Applies edits to the OSA install guide appendix C

Change-Id: Idacb80dedb767773bc7c4d2734f4ace5de5b0ad6
Partial-bug: #1629798

weezer/openstack-ansible,openstack/openstack-ansible,bunchc/openstack-ansible,yanyao/openstack-ansible,robb-romans/openstack-ansible,Logan2211/openstack-ansible,openstack/openstack-ansible,cfarquhar/openstack-ansible,cloudnull/os-ansible-deployment,BjoernT/os-ansible-deployment,cfarquhar/openstack-ansible,Logan2211/openstack-ansible,cloudnull/os-ansible-deployment,robb-romans/openstack-ansible,os-cloud/os-ansible-deployment,BjoernT/openstack-ansible,yanyao/openstack-ansible,BjoernT/os-ansible-deployment,stackforge/os-ansible-deployment,os-cloud/os-ansible-deployment,BjoernT/openstack-ansible,bunchc/openstack-ansible,stackforge/os-ansible-deployment,weezer/openstack-ansible,BjoernT/os-ansible-deployment