Change the device name for apt after updating type
Change the device name for apt after updating type

- After switching from T2 to T3 instance_type, the default device name of root
file systems and EBS resources changes from xdvX to nvmeXnY.

- Without this change new instances come up without usable disks

solo: da39a3ee5e6b4b0d3255bfef95601890afd80709@schmie

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet