OpenStack host maintenance and upgrade in interaction with application on top of it

Gerrit User 15834 9539e9cd0b Create change ... Uploaded patch set 1. Patch-set: 1 Change-id: I7f83c6472d1a86fa62e38cab2856be6c0d6bb259 Subject: Add test cases Branch: refs/heads/master Commit: 293f37040f Groups: 293f37040f		2020-03-18 16:37:04 +00:00