Fix user for manage commands

All utilities can create files which are used by nova services
which are running under nova user. That's why they should be also
run under nova. Nova user and groups are created by packages.

Change-Id: I615e9e057d9e3fef7c28da74395a334b9b50fb8d
Related-Prod: https://mirantis.jira.com/browse/PROD-26018
3 files changed