SNMP support for monitoring fabric power utilization

An SNMP trap is generated whenever the fabric power consumption exceeds the configured threshold value. The SNMP trap jnxFabricHighPower has been added to the jnxFabricChassisTraps group to indicate excessive power consumption. The SNMP trap jnxFabricHighPowerCleared added to the jnxFabricChassisOKTraps group sends notification when the condition of consuming excessive power is cleared.