This makes the inject_image_metadata task use the ImportActionWrapper.
Because of the inbuilt rejection of internal os_glance_* property
manipulation, this also brings an operator-visible change to the
injection behavior. Specifically, os_glance_* keys can no longer be
injected via config (nor should they ever have been).
Change-Id: Ib1138ee2cd0383f14c710716f3c103a146b0c4dd
In Python 3.7, "async" is a keyword. To prevent it from
conflicting, rename the async package to async_.
Change-Id: I1eaf87eedb86679d9ca9323aac05f0770c33efea
Closes-Bug: #1781617