Imports
- github.com/mitchellh/packer/helper/config
- github.com/mitchellh/packer/common
- github.com/aws/aws-sdk-go/service/ec2
- github.com/mitchellh/packer/builder/amazon/common
- github.com/mitchellh/packer/packer
- github.com/mitchellh/packer/template/interpolate
- github.com/mitchellh/multistep