Fix ubuntu provisioning

This patch fixes partitioning counting. We use kind of
'$(readlink -f $(ls /dev/disk/by-path/foo) )' as a
key for a partitioning counter, but in that particular place
it was like /dev/disk/by-path/foo.

Change-Id: Iafbfcda96d0904ff87781df4d3b04d9293656d04
Closes-Bug: 1319995