generate qcow2 images

Created by: shibumi

We want to provide qcow2 images for cloud providers like openstack or hetzner cloud. Therefore we need to have a new json specification for packer. This way we keep our vagrant build specification clean.

Things what need to be done:

moving cloud-init back to official repositories
write a new specification for cloud images with provision scripts
modifying the ansible role in the infrastructure repository

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information