zos2: automated migration from v2 to v3

[muhamadazmy]

Details and specifications can be found here

[muhamadazmy]

Building the migration tool the migration tool will do the following:

• Use the local known farm id to get list of payout addresses for this farmer
• Search for farms on v3 that has the same payout addresses. If not try again later (may be every 1 hour or so)
• If a match found,
  • detect and rewrite the USB stick with v3 boot
  • Wipe the disks
  • Reboot