Change io time units to %util

When appying rate() to seconds we have 'seconds per second' or fractions of the second, so actually it actually can be from 0 to 1.

Also update intervalFactor to 1 for better rates.

Signed-off-by: Vitaly Zhuravlev <zhuravlev.vitaly@gmail.com>

docs/node-mixin/lib/prom-mixin.libsonnet

@@ -192,14 +192,17 @@ local table = grafana70.panel.table;
       .addTarget(prometheus.target(
         'rate(node_disk_read_bytes_total{%(nodeExporterSelector)s, instance="$instance", %(diskDeviceSelector)s}[$__rate_interval])' % config,
         legendFormat='{{device}} read',
+        intervalFactor=1,
       ))
       .addTarget(prometheus.target(
         'rate(node_disk_written_bytes_total{%(nodeExporterSelector)s, instance="$instance", %(diskDeviceSelector)s}[$__rate_interval])' % config,
         legendFormat='{{device}} written',
+        intervalFactor=1,
       ))
       .addTarget(prometheus.target(
         'rate(node_disk_io_time_seconds_total{%(nodeExporterSelector)s, instance="$instance", %(diskDeviceSelector)s}[$__rate_interval])' % config,
         legendFormat='{{device}} io time',
+        intervalFactor=1,
       )) +
       {
         seriesOverrides: [
@@ -214,7 +217,7 @@ local table = grafana70.panel.table;
         ],
         yaxes: [
           self.yaxe(format='Bps'),
-          self.yaxe(format='s'),
+          self.yaxe(format='percentunit'),
         ],
       },
 
@@ -410,7 +413,7 @@ local table = grafana70.panel.table;
     local networkReceived =
       graphPanel.new(
         'Network Received',
-        description="Network received (bits/s)",
+        description='Network received (bits/s)',
         datasource='$datasource',
         span=6,
         format='bps',
@@ -420,12 +423,13 @@ local table = grafana70.panel.table;
       .addTarget(prometheus.target(
         'rate(node_network_receive_bytes_total{%(nodeExporterSelector)s, instance="$instance", device!="lo"}[$__rate_interval]) * 8' % config,
         legendFormat='{{device}}',
+        intervalFactor=1,
       )),
 
     local networkTransmitted =
       graphPanel.new(
         'Network Transmitted',
-        description="Network transmitted (bits/s)",
+        description='Network transmitted (bits/s)',
         datasource='$datasource',
         span=6,
         format='bps',
@@ -435,6 +439,7 @@ local table = grafana70.panel.table;
       .addTarget(prometheus.target(
         'rate(node_network_transmit_bytes_total{%(nodeExporterSelector)s, instance="$instance", device!="lo"}[$__rate_interval]) * 8' % config,
         legendFormat='{{device}}',
+        intervalFactor=1,
       )),
 
     local cpuRow =