make class package private

Author: laurit

instrumentation/elasticsearch/elasticsearch-transport-common/testing/src/main/java/io/opentelemetry/javaagent/instrumentation/elasticsearch/transport/AbstractElasticsearchClientTest.java

@@ -27,7 +27,7 @@
 import org.elasticsearch.transport.RemoteTransportException;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
-public abstract class AbstractElasticsearchClientTest {
+abstract class AbstractElasticsearchClientTest {
 
   protected static final long TIMEOUT = TimeUnit.SECONDS.toMillis(10);