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

Gerrit User 27068 f6ce55611a Update patch set 1 ... Patch Set 1: Code-Review+2 LGTM. Thanks. Patch-set: 1 Reviewer: Gerrit User 27068 <27068@4a232e18-c5a9-48ee-94c0-e04e7cca6543> Label: Code-Review=+2		2019-10-28 03:18:38 +00:00