Added a new item for Prerequisites.
Added a new note.
Minor grammar updates.
Update "About This Task" section:
- Delete "On the subcloud, lock/unlock" step.
- Add the "Delete the subcloud from the previous System Controller" step.
Update "Procedure" section:
- Delete "Lock controller-1 of the subcloud" step.
- Add "Ensure all the controller(s) of the subcloud" step.
- Delete All the content in: "For an AIO-SX subcloud," step.
Signed-off-by: Elaine Fonaro <elaine.fonaro@windriver.com>
Change-Id: I3e950284056b3529eac6217b3e6182f15a363944