CFBMC-6884：拔掉电源线时，AFF A70 "system controller environment show" 将 PSU 报告为 "GOOD"

问题描述

从 PSU 中拆除电源线在环境中显示"良好"状态。示例： 
::> 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
...