Fix statsd concurrency bug (#8885)

* Fix the issue

* Remove test I was using for replication

* Accidentally removed test.

* Add lock only where it is necessary.

* eliminate unnecessary space

plugins/inputs/statsd/statsd.go

@@ -712,6 +712,8 @@ func (s *Statsd) parseStatsdLine(line string) error {
 // map of tags.
 // Return values are (<name>, <field>, <tags>)
 func (s *Statsd) parseName(bucket string) (string, string, map[string]string) {
+	s.Lock()
+	defer s.Unlock()
 	tags := make(map[string]string)
 
 	bucketparts := strings.Split(bucket, ",")