https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2
https://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64-disk1.img
http://repository.cloudifysource.org/cloudify/4.0.1/sp-release/cloudify-manager-premium-4.0.1.qcow2
https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2
https://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64-disk1.img
http://repository.cloudifysource.org/cloudify/4.0.1/sp-release/cloudify-manager-premium-4.0.1.qcow2