fix(traffic): fix time in traffic by hour histogram (#58)

fix traffic by hour histogram with a wrong order in the x axis (e.g. 15:00 14:00 13:00 12:00 16:00)

Author: cotosso

imageroot/etc/dashboards/network_traffic_by_client.json

@@ -253,7 +253,7 @@
           "editorMode": "code",
           "format": "table",
           "rawQuery": true,
-          "rawSql": "SELECT bucket, bytes \nFROM ca_dpi_stats_hourly_client\nWHERE $__timeFilter(bucket) AND uuid = '$uuid' AND client_address = '$client_address'",
+          "rawSql": "SELECT bucket, bytes \nFROM ca_dpi_stats_hourly_client\nWHERE $__timeFilter(bucket) AND uuid = '$uuid' AND client_address = '$client_address'\nORDER BY bucket",
           "refId": "A",
           "sql": {
             "columns": [
@@ -1039,4 +1039,4 @@
   "uid": "b14a1181-a2ee-4df4-a732-888e0190037f",
   "version": 25,
   "weekStart": ""
-}
+}