Added disk image type for vmdk.
Rasd entries must be alphabetical.
Generate .vmx config file in addition to .ovf
Rename log message from "starting" to "creating"
Change OVA generation:
* fix OVF file diskname: file should be .vmdk in reference, not .ovf.
* add additional attribute converter, because qemu-img can't create .ova with
  streamOptimized disktype.