
"undercloud" host is too opinionated and hostnames can change. We should rather apply the tasks to the Undercloud HostGroup, which contains one host for now: the actual undercloud hostname. So this patch switches "undercloud" to "Undercloud" so when the hostname isn't "undercloud", the external tasks will run correctly on this host. Change-Id: I7200f930387406e6cc8e6fee6d5278768074c892 Closes-Bug: #1784910