[Nantes] add scaling + add fan speed support

data/grid5000/sites/nantes/pdus/cooling-Z1.json

@@ -3,36 +3,50 @@
   "mac": "00:c0:b7:f5:fa:63",
   "metrics": [
     {
-      "description": "Temperature in input of cooling system, in tenths of degrees Celsius",
-      "name": "cooling_input_temperature_tenth_celsius",
+      "description": "fan speed of cooling system, in percent",
+      "name": "cooling_fan_speed_percent",
       "period": 5000,
+      "scale_factor": 0.1,
+      "source": {
+        "id": "1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.3.1.5",
+        "protocol": "snmp"
+      }
+    },
+    {
+      "description": "Temperature in output of cooling system, in degrees Celsius",
+      "name": "cooling_supply_temperature_celsius",
+      "period": 5000,
+      "scale_factor": 0.1,
       "source": {
         "id": "1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.3.1.7",
         "protocol": "snmp"
       }
     },
     {
-      "description": "Temperature in output of cooling system, in tenths of degrees Celsius",
-      "name": "cooling_output_temperature_tenth_celsius",
+      "description": "Temperature in input of cooling system, in degrees Celsius",
+      "name": "cooling_return_temperature_celsius",
       "period": 5000,
+      "scale_factor": 0.1,
       "source": {
         "id": "1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.3.1.9",
         "protocol": "snmp"
       }
     },
     {
-      "description": "Power consumption of cooling system, in tenths of kilowatt",
-      "name": "cooling_power_watt",
+      "description": "Power consumption of cooling system, in kilowatt",
+      "name": "cooling_power_kilowatt",
       "period": 5000,
+      "scale_factor": 0.01,
       "source": {
         "id": "1.3.6.1.4.1.318.1.1.27.1.6.1.2.1.3.1.2",
         "protocol": "snmp"
       }
     },
     {
-      "description": "Sensor temperature reading, in tenths of degrees Celsius",
-      "name": "pdu_temperature_tenth_celsius",
+      "description": "Sensor temperature reading, in degrees Celsius",
+      "name": "pdu_temperature_celsius",
       "period": 5000,
+      "scale_factor": 0.1,
       "source": {
         "id": "1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.3.1.%PORT%",
         "protocol": "snmp"