Pass dropcounter rate option if no max counter and no reset value or reset value…

Pass dropcounter rate option if no max counter and no reset value or reset value as 0 is specified (#7743)

pkg/tsdb/opentsdb/opentsdb.go

@@ -190,6 +190,10 @@ func (e *OpenTsdbExecutor) buildMetric(query *tsdb.Query) map[string]interface{}
 			rateOptions["resetValue"] = resetValue.MustFloat64()
 		}
 
+		if !counterMaxCheck && (!resetValueCheck || resetValue.MustFloat64() == 0) {
+			rateOptions["dropcounter"] = true
+		}
+
 		metric["rateOptions"] = rateOptions
 	}