tree 6fc4f0b909b15e31abd97919212f17303791c3c7
parent 81957841962362be620339dd30573030d54475df
author Matt Spinler <spinler@us.ibm.com> 1531336432 -0500
committer Matt Spinler <spinler@us.ibm.com> 1533586217 -0500

Add LastStateChangeTime to chassis manager

This property is set to the timestamp of the last time
the chassis power state changed.  It is persisted
so it survives reboots.

Resolves openbmc/openbmc#3300

Tested:  Various incantations of power cycling, reboots,
         and AC pulls.

Change-Id: I19f244e0490bc9b921454e393989a9cbd283e2dd
Signed-off-by: Matt Spinler <spinler@us.ibm.com>