- fixed OVA creation
  * when using ovftool extract the created vmdk image and
    manifest files from the created OVA. This is required to
    produce streamOptimized vmdk images which can't be
    generated with qemu
  * fixed Invalid value 'MB' for element 'VirtualQuantityUnits'
    for vSphere 5 in the .ovf file
  * fixed allocated units set in the .ovf, vSphere 5 requires
    a value here