Sync time for "Priority" attribute write to update.

Setting the "Priority" value triggers a chain reaction to update
the priorities for other versions and set the boot version via
systemd service files that are async.

As a work-around for openbmc/openbmc#2857, explicitly wait 10s
after writting the "Priority" value.

Change-Id: I69bac0712ad6e4356f7cc14d50ebca9826783280
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
1 file changed