This patch deletes 'package_upgrade: true' option from cloud-init confs.
It caused upgrading of all the packages in the images spawned by murano.
This made spawning VMs slow and in certain cases caused
dpkg locks be still in place when murano-agent attempted to
install packages
Change-Id: I440d2985f9122dad53c81b15148e60df4e7e9583
Closes-Bug: 1548857
The yaml file allows for installing murano-agent and chef
and puppet by cloud-init
Change-Id: Ia16270d67eeff50d41d8f879e7b4ad0a1037d4b1
Targets-blueprint: conf-lang-instance