Add UPGRADE feature was lost after merge

Note: this feature is strongly needed to accomplish FUEL-617
(1.04 Epic: Non-disruptive upgrade of OpenStack versions)

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Fix 3.0.1 typo

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>