tree 365b7de83e3fbc163a09fcd3ee77e54d71c5e62f
parent c68604bd993d00ad11ee394514295ff5a2ef6f12
author Gunnar Mills <gmills@us.ibm.com> 1550183445 -0600
committer Ed Tanous <ed.tanous@intel.com> 1552928952 +0000

Redfish: Add Chassis PowerState call

Make a call to /xyz/openbmc_project/state/chassis0 to get the
chassis PowerState.
Very similiar to how we get the System PowerState
https://github.com/openbmc/bmcweb/blob/abf2add6a35aaf42ba60c4ae955a4d8925b13b19/redfish-core/lib/systems.hpp#L471

Resolves openbmc/bmcweb#27

Tested: Loaded this on a Witherspoon and power on/off. Saw correct
        PowerState.
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
Change-Id: I9dd008a902098f1872560d985249375a2d317f25