Update endpoint to beta from v1.0.

Author: mikemcl-msft

graphsdk/src/main/java/com/microsoft/graph/generated/BaseGraphServiceClient.java

@@ -4,17 +4,8 @@
 
 package com.microsoft.graph.generated;
 
-import com.microsoft.graph.concurrency.*;
-import com.microsoft.graph.core.*;
+import com.microsoft.graph.core.BaseClient;
 import com.microsoft.graph.extensions.*;
-import com.microsoft.graph.http.*;
-import com.microsoft.graph.generated.*;
-import com.microsoft.graph.options.*;
-import com.microsoft.graph.serializer.*;
-
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
 
 // **NOTE** This file was generated by a tool and any changes will be overwritten.
 
@@ -26,7 +17,7 @@ public class BaseGraphServiceClient extends BaseClient implements IBaseGraphServ
     /**
      * The default endpoint for the Microsoft Graph Service
      */
-    public static final String DEFAULT_GRAPH_ENDPOINT = "https://graph.microsoft.com/v1.0";
+    public static final String DEFAULT_GRAPH_ENDPOINT = "https://graph.microsoft.com/beta";
 
     /**
      * The current endpoint