Replace Objects.hash with HashingUtils.hash

Co-authored-by: dougqh <dougqh@gmail.com>

Author: datadog-datadog-prod-us1-2[bot]

internal-api/src/main/java/datadog/trace/api/telemetry/MetricCollector.java

@@ -4,6 +4,7 @@
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
 
+import datadog.trace.util.HashingUtils;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
@@ -89,7 +90,7 @@ public boolean equals(final Object o) {
 
     @Override
     public int hashCode() {
-      return Objects.hash(metricName, common, namespace, tags);
+      return HashingUtils.hash(metricName, common, namespace, tags);
     }
 
     @Override
@@ -145,7 +146,7 @@ public boolean equals(Object o) {
 
     @Override
     public int hashCode() {
-      return Objects.hash(metricName, common, namespace, tags);
+      return HashingUtils.hash(metricName, common, namespace, tags);
     }
 
     @Override