Change client to management for HDI

preview/docs-ref-mapping/reference.yml

@@ -16,8 +16,8 @@
     uid: azure.java.sdk.landingpage.service.hdinsight
     href: ~/docs-ref-services/hdinsight.md
     items:
-      - name: Client
-        uid: azure.java.sdk.landingpage.service.hdinsight.Client
+      - name: Management
+        uid: azure.java.sdk.landingpage.service.hdinsight.Management
         landingPageType: Service
         children:
         - com.microsoft.azure.management.hdinsight*