Add documentation for root_volume_type
Add documentation for root_volume_type

rnaveiras/packer,mitchellh/packer,paulmey/packer,rnaveiras/packer,pecigonzalo/packer,tas50/packer,rnaveiras/packer,tas50/packer,mitchellh/packer,tb3088/packer,timsutton/packer,rnaveiras/packer,ricardclau/packer,dave2/packer,tb3088/packer,mkuzmin/packer,youhong316/packer,timsutton/packer,dave2/packer,grubernaut/packer,youhong316/packer,tas50/packer,ricardclau/packer,paulmey/packer,mitchellh/packer,hashicorp/packer,paulmey/packer,dave2/packer,dave2/packer,dave2/packer,hashicorp/packer,mkuzmin/packer,tas50/packer,youhong316/packer,hashicorp/packer,bryson/packer,timsutton/packer,bryson/packer,rnaveiras/packer,mitchellh/packer,mkuzmin/packer,bryson/packer,grubernaut/packer,ricardclau/packer,tas50/packer,paulmey/packer,paulmey/packer,youhong316/packer,timsutton/packer,tb3088/packer,ricardclau/packer,ricardclau/packer,rnaveiras/packer,paulmey/packer,mkuzmin/packer,pecigonzalo/packer,youhong316/packer,mkuzmin/packer,pecigonzalo/packer,grubernaut/packer,grubernaut/packer,dave2/packer,tb3088/packer,mkuzmin/packer,pecigonzalo/packer,ricardclau/packer,grubernaut/packer,youhong316/packer,grubernaut/packer,bryson/packer,tb3088/packer,tas50/packer,bryson/packer,bryson/packer,timsutton/packer,mitchellh/packer,timsutton/packer,hashicorp/packer,tb3088/packer