Fix picking new object versions after upgrade

Till Queens release it was necessary to restart all cinder services
after upgrade to instruct cinder to use new object versions during
communications.
Starting from Queens release it is possible to run dbsync with --bump-versions

This patch implements that logic in post upgrade stage.

Change-Id: I85452c41e5b76ead3c617cdad6798482e857ec4f
Related-Prod: PROD-25668
1 file changed