Review fixes for finatra-2.9:javaagent (open-telemetry#17973)

Co-authored-by: otelbot <197425009+otelbot@users.noreply.github.com>

Author: otelbot[bot]

instrumentation/finatra-2.9/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/finatra/FinatraCodeAttributesGetter.java

@@ -8,7 +8,7 @@
 import io.opentelemetry.instrumentation.api.incubator.semconv.code.CodeAttributesGetter;
 import javax.annotation.Nullable;
 
-public class FinatraCodeAttributesGetter implements CodeAttributesGetter<FinatraRequest> {
+class FinatraCodeAttributesGetter implements CodeAttributesGetter<FinatraRequest> {
   @Nullable
   @Override
   public Class<?> getCodeClass(FinatraRequest request) {

instrumentation/finatra-2.9/metadata.yaml

@@ -8,6 +8,7 @@ features:
   - CONTROLLER_SPANS
 configurations:
   - name: otel.instrumentation.common.experimental.controller-telemetry.enabled
+    declarative_name: java.common.controller_telemetry/development.enabled
     description: Enables the creation of experimental controller spans.
     type: boolean
     default: false