Add machine readable size facts.

[markdv77]

Use Case

I would like to use our centralized facts databases, The Froreman, to e.g. get al list of hosts that e.g. currently don't have X amounts of free space in some volume group. Pretend we have plans to add a volume on all hosts, and would like to know on how many we do/don't have the room for it. But this sort of query doesn't work on these human readable numbers.

volume_groups => {
  vg00 => {
    free => "152.00m",
    size => "<95.99g",
  }
}

Describe the Solution You Would Like

Some additional numerical properties that express the sizes in bytes would solve this issue. This seems to be common solution used by other facts like 'disks', 'memory', 'mountpoints' and 'partitions' as well, so this would fit right in. One example of the 'mountpoints ' fact:

mountpoints => {
  / => {
    available => "1.77 GiB",
    available_bytes => 1898541056,
    capacity => "0.92%",    device => "/dev/mapper/vg00-root",    filesystem => "ext4",
    options => [      "rw",      "noatime",      "errors=remount-ro"    ],
    size => "1.90 GiB",
    size_bytes => 2040373248,
    used => "16.86 MiB",
    used_bytes => 17682432
  },

Please consider doing the same with this fact.

Thank you.