HDDS-1721 : Client Metrics are not being pushed to the configured sink while running a hadoop command to write to Ozone. (#1034)

hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientMetrics.java

@@ -69,6 +69,7 @@ public class XceiverClientMetrics {
   }
 
   public static XceiverClientMetrics create() {
+    DefaultMetricsSystem.initialize(SOURCE_NAME);
     MetricsSystem ms = DefaultMetricsSystem.instance();
     return ms.register(SOURCE_NAME, "Storage Container Client Metrics",
         new XceiverClientMetrics());