Emilien Macchi 77aa6763f6 Undercloud upgrades will use upgrade_tasks
Instead of using host_prep_tasks (which are part of deployment tasks),
we'll use the upgrade tasks that are now well known and tested in
previous releases, when the we containerized the overcloud.

Depends-On: Id25e6280b4b4f060d5e3f78a50ff83aaca9e6b1a
Change-Id: Ic199c7d431e155e2d37996acd0d7b924d14af2b7
2018-05-05 06:52:34 +00:00
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