Core/Metric: Send metrics in smaller intervals

Send metrics in smaller intervals to reduce the chances of triggering HTTP status "413 Payload Too Large" from InfluxDB.
Another way to avoid this is to set max-body-size to 0 in InfluxDB config.
For more information see https://docs.influxdata.com/influxdb/v1.8/administration/config/#max-body-size--25000000

src/server/worldserver/worldserver.conf.dist

@@ -4091,7 +4091,7 @@ Metric.Enable = 0
 #        Default:     10 seconds
 #
 
-Metric.Interval = 10
+Metric.Interval = 1
 
 #
 #    Metric.ConnectionInfo