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

Gerrit User 21723 16079767f5 Update patch set 2 ... Patch-set: 2 Reviewer: Gerrit User 21723 <21723@4a232e18-c5a9-48ee-94c0-e04e7cca6543>		2019-04-29 21:33:47 +00:00
4c743ded8ec67ab15eec8dfa950c9cda5125b2dd	Update patch set 1	2019-04-29 21:33:47 +00:00