Nolan Brubaker 7431aafa86 Document required repository hosts config info
Installs must have either the repo-infra_hosts list, or the
openstack_repo_url defined. Otherwise, greenfield installations
following our installation docs will fail.

Change-Id: I116040302e846530895836dd8aab9d4136b110af
Closes-Bug: #1475000
2015-08-13 12:45:57 +01:00
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