Deprecated OID is used for FAN monitoring A10

According to https://mibs.observium.org/mib/A10-AX-MIB/  axSysHwFan1Speed, axSysHwFan2Speed and axSysHwFan3Speed are deprecated and instead axSysFanStatusTable should be used.

In my case axSysHwFan1Speed = Fan1,  axSysHwFan2Speed = Not found,  axSysHwFan3Speed = Fan2.  This causes Fan3 to not be monitored and unfortunately Fan3 failed in one of the units which we didn't pick up as the fan isn't monitored by Observium