Prepare cloudinit to growroot VCP with LVM

This patch adds cloudinit data that will grow LVM
based VCP image.

New soft param is introduced:

  * salt_control_cluster_vcp_lvm_device

it defines name of partition drive that is included to
PVS by default ('/dev/vda3'). Is dependent on disk model
that is used by VCP.

Change-Id: I070280f830c76b42a9a2c4522f0adb0648d33757
Related-Prod: PROD-24537
1 file changed