Add ability to get confirmation on event

Currently salt doesn't allow to get confirmation on minion upon
successfull reactor execution on event. However there can be issues with
reactor in salt 2017.7 [1] or reactor register state can fail if pillar
failed to render, so node registration confirmation maybe needed. In order
to enable this functionality add node_confirm_registration parameter to
event data with value true.

[1] https://github.com/saltstack/salt/issues/47539
Change-Id: I1abc4fdf172e018dcdb48abcf61532fb51ad3660
Related-Prod: https://mirantis.jira.com/browse/PROD-21463
3 files changed