It appears that this tag stopped working recently when switching
from import to include syntax. This patch adds the necessary
'always' tag to ensure the 'nova-key' tag gets carried through.
Change-Id: Iee1dca9221b6968d11be54fc1df03b2f8a6c3f44
(cherry picked from commit 7a0c0f0ad27c9eae188f33d99b95f5299b9b7fc4)