fix(java-client): use remove_result instead of put_result for rrdb_remove_operator (#2280)

Although this is not a typical bug, the return value of the `remove` RPC interface for
`rrdb` should be adapted using `remove_result` rather than `put_result` despite the
same type received by both of them as `update_response`.

Author: empiredan

java-client/src/main/java/org/apache/pegasus/operator/rrdb_remove_operator.java

@@ -46,7 +46,7 @@ public void send_data(org.apache.thrift.protocol.TProtocol oprot, int seqid) thr
   }
 
   public void recv_data(TProtocol iprot) throws TException {
-    rrdb.put_result result = new rrdb.put_result();
+    rrdb.remove_result result = new rrdb.remove_result();
     result.read(iprot);
     if (result.isSetSuccess()) resp = result.success;
     else