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CFBMC-3955: Undertemperature warnings after BMC firmware upgrade

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Issue

Following an upgrade of BMC firmware to 11.10 or 17.2, sporadic undertemperature warning alerts for the controller chassis (internal shelf) are reported by both nodes.

Example:

  [node1: dsa_worker4: ses.status.temperatureWarning:alert]: DS212-12 (S/N SHJGD23189XXXXX) shelf 0 on channel 0a temperature warning for Temperature sensor 11: non-critical status; undertemperature warning. Current temperature: 0 C (32 F). This module is on the rear of the shelf at the top left, on shelf module A.  
  [node1: dsa_worker4: ses.status.temperatureInfo:info]: DS212-12 (S/N SHJGD23189XXXXX) shelf 0 on channel 0a temperature information for Temperature sensor 11: normal status.

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