Upgrades, fixed host system upgrader

Switch /etc/fuel/version.yaml to new
version when run host system upgrade
engine because puppet relies on this
file.

This change fixes the bug, when user
runs upgrade several times and puppet
overwrites supervisor configs for
previous version.

Change-Id: I79ff27bb5078d0cf885612af0560b9e1623c6206
Closes-bug: #1349286
Merge "Upgrades, fixed host system upgrader"