Describes any IaaS-specific properties needed to associated with AZ; for most IaaSes, some data here is actually required. Example: `availability_zone`. Default is `{}` (empty Hash).

See:

- [AWS CPI AZ cloud properties](https://bosh.io/docs/aws-cpi.html#azs)
- [Azure CPI AZ cloud properties](https://bosh.io/docs/azure-cpi.html#azs)
- [OpenStack CPI AZ cloud properties](https://bosh.io/docs/openstack-cpi.html#azs)
- [Softlayer CPI AZ cloud properties](https://bosh.io/docs/softlayer-cpi.html#azs)
- [Google Cloud Platform CPI AZ cloud properties](https://bosh.io/docs/google-cpi.html#azs)
- [vSphere CPI AZ cloud properties](https://bosh.io/docs/vsphere-cpi.html#azs)
- [vCloud CPI AZ cloud properties](https://bosh.io/docs/vcloud-cpi.html#azs)
