CFBMC-6884: AFF A70 "system controller environment show" reports PSU as "GOOD" when power cable is removed
Issue
Power cable removal from PSU shows "good" status in environment. Example: ::> event log show
Time Node      Severity Event
---- --------- -------- ---------------------------
...  node_name NOTICE   monitor.chassisPowerSupply.degraded: Chassis power supply 1 is degraded: PSU1 In Curr is Unreadable
...  node_name NOTICE   monitor.chassisPowerSupply.degraded: Chassis power supply 1 is degraded: PSU1 In Volt is Unreadable
::> system controller environment show
Node       FRU Name State      
---------  -------- -----
node_name  PSU2 FRU GOOD
node_name  PSU1 FRU GOOD
...
