Add keystone/upgrade tasks

This commit adds kestone/upgrade/control:
 pre.sls: Online dbsync/pre checks
 upgrade.sls: Stop services/Install latest package/Start services
 post.sls: Cleanup tasks

Change-Id: I33e657cab6e04505f65dfe411659cd6f551ab665
Related-Prod: PROD-21931
10 files changed