grafana: omit current day points on history chart

The current day point that matters is already displayed in the "status"
chart, so it doesn't make sense to duplicate it on the "history" chart
as well. It may even be confusing.

Signed-off-by: Leonardo Graboski Veiga <[email protected]>

TorizonOSBuildStatusGrafana/grafana-config/dashboard.json

@@ -221,7 +221,7 @@
               "type": "influxdb",
               "uid": "influxdb_jenkins"
             },
-            "query": "from(bucket: \"jenkinsdatabucket\")\n  |> range(start: -30d)\n  |> filter(fn: (r) => r[\"_measurement\"] == \"jenkinsbuild\" and r[\"_value\"] != \"\")\n  |> aggregateWindow(every: 1d, fn: first)\n  |> map(fn: (r) => ({_time: r._time, _field: r._field, _value: r._value}))\n",
+            "query": "import \"date\"\nfrom(bucket: \"jenkinsdatabucket\")\n  |> range(start, stop: date.sub(from: today(), d: 5m))\n  |> filter(fn: (r) => r[\"_measurement\"] == \"jenkinsbuild\" and r[\"_value\"] != \"\")\n  |> aggregateWindow(every: 1d, fn: first)\n  |> map(fn: (r) => ({_time: r._time, _field: r._field, _value: r._value}))\n",
             "refId": "A"
           }
         ],