Update after main changes

Author: LikeTheSalad

disk-buffering/src/test/java/io/opentelemetry/contrib/disk/buffering/IntegrationTest.java

@@ -49,7 +49,7 @@
 import org.mockito.junit.jupiter.MockitoExtension;
 
 @ExtendWith(MockitoExtension.class)
-public class IntegrationTest {
+class IntegrationTest {
   private Tracer tracer;
   private SdkMeterProvider meterProvider;
   private Meter meter;