Revert "Fix failing kafka integration test" (#1077)

* Revert "Make the metrics produced by jaeger query scoped to the query component, and generated for all span readers (not just ES) (#1074)"

Signed-off-by: Pavol Loffay <ploffay@redhat.com>

Author: pavolloffay

plugin/storage/integration/kafka_test.go

@@ -88,11 +88,7 @@ func (s *KafkaIntegrationTestSuite) initialize() error {
 	s.SpanWriter = spanWriter
 	s.SpanReader = &ingester{traceStore}
 	s.Refresh = func() error { return nil }
-	s.CleanUp = func() error {
-		// TODO close would not work if multiple tests are run
-		spanConsumer.Close()
-		return nil
-	}
+	s.CleanUp = func() error { return nil }
 	return nil
 }