Add @LogLevels for SftpRemoteFileTemplateTests

Not clear why `SftpRemoteFileTemplateTests.testINT3412AppendStatRmdir()`
 is failing on CI Linux, so add a tracing diagnostics to see how Apache SSHD behaves over there

Author: artembilan

spring-integration-sftp/src/test/java/org/springframework/integration/sftp/session/SftpRemoteFileTemplateTests.java

@@ -37,6 +37,7 @@
 import org.springframework.integration.file.remote.session.SessionFactory;
 import org.springframework.integration.file.support.FileExistsMode;
 import org.springframework.integration.sftp.SftpTestSupport;
+import org.springframework.integration.test.condition.LogLevels;
 import org.springframework.messaging.MessageDeliveryException;
 import org.springframework.messaging.MessagingException;
 import org.springframework.messaging.support.GenericMessage;
@@ -62,6 +63,7 @@ public class SftpRemoteFileTemplateTests extends SftpTestSupport {
 	@Autowired
 	private CachingSessionFactory<SftpClient.DirEntry> sessionFactory;
 
+	@LogLevels(level = "trace", categories = { "org.apache.sshd", "org.springframework.integration.sftp" })
 	@Test
 	public void testINT3412AppendStatRmdir() {
 		SftpRemoteFileTemplate template = new SftpRemoteFileTemplate(sessionFactory);