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

Bug: #1629798
Change-Id: I81d831378b8ac1f782410f61d954c3c5917551e6

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