openpower-software-manager: Move ubimount.service logic to script

The service files that manage the pnor ubi volumes and mount points are
starting to get too much logic in them. Move the logic to a shell script.

Change-Id: I57d6ff7ffb32d24704ceec77afd1d07622bc6de8
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
2 files changed