Previously debconf was used and thus this only worked on dpkg based
systems. Now we can support any system that runs a reasonably recent
cloud-init.
Change-Id: I1397aefb3af400adcfd98f858c5a32fad2b584b5
Disables cloud-init from querying EC2 metadata, or any cloud metadata
service. It keeps only the Nocloud and None data sources, which are both
expected to be "baked in" to an image. This speeds up boot by 2 minutes
on hosts where cloud-init cannot reach the EC2 metadata service.
Change-Id: I43522c4a442c0f2fc2044d4898768ceb4f839099