Fix data disks URI
Fix data disks URI

Fixing bug appeared in 0589f57d4d85ef28054d47049c346e53c1698205
hashicorp/packer,rnaveiras/packer,rnaveiras/packer,hashicorp/packer,rnaveiras/packer,hashicorp/packer,rnaveiras/packer,pecigonzalo/packer,mitchellh/packer,ricardclau/packer,pecigonzalo/packer,ricardclau/packer,ricardclau/packer,mitchellh/packer,ricardclau/packer,rnaveiras/packer,mitchellh/packer,pecigonzalo/packer,rnaveiras/packer,mitchellh/packer,ricardclau/packer,ricardclau/packer,hashicorp/packer,mitchellh/packer,pecigonzalo/packer