Address comment problems

Author: steverao

instrumentation/apache-dubbo-2.7/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachedubbo/v2_7/OpenTelemetryClientFilter.java

@@ -17,7 +17,7 @@
 import org.apache.dubbo.rpc.Result;
 
 @Activate(group = {"consumer"})
-public class OpenTelemetryClientFilter implements Filter {
+public final class OpenTelemetryClientFilter implements Filter {
 
   private final Filter delegate;
 

instrumentation/apache-dubbo-2.7/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/apachedubbo/v2_7/OpenTelemetryServerFilter.java

@@ -17,7 +17,7 @@
 import org.apache.dubbo.rpc.Result;
 
 @Activate(group = {"provider"})
-public class OpenTelemetryServerFilter implements Filter {
+public final class OpenTelemetryServerFilter implements Filter {
 
   private final Filter delegate;
 

instrumentation/apache-dubbo-2.7/library-autoconfigure/src/main/java/io/opentelemetry/instrumentation/apachedubbo/v2_7/DubboTelemetry.java

@@ -13,6 +13,9 @@
 /** Entrypoint for instrumenting Apache Dubbo servers and clients. */
 public final class DubboTelemetry {
 
+  private final Instrumenter<DubboRequest, Result> serverInstrumenter;
+  private final Instrumenter<DubboRequest, Result> clientInstrumenter;
+
   /** Returns a new {@link DubboTelemetry} configured with the given {@link OpenTelemetry}. */
   public static DubboTelemetry create(OpenTelemetry openTelemetry) {
     return builder(openTelemetry).build();
@@ -25,10 +28,6 @@ public static DubboTelemetryBuilder builder(OpenTelemetry openTelemetry) {
     return new DubboTelemetryBuilder(openTelemetry);
   }
 
-  private final Instrumenter<DubboRequest, Result> serverInstrumenter;
-
-  private final Instrumenter<DubboRequest, Result> clientInstrumenter;
-
   DubboTelemetry(
       Instrumenter<DubboRequest, Result> serverInstrumenter,
       Instrumenter<DubboRequest, Result> clientInstrumenter) {