Small clean

Signed-off-by: p-arvy <pierre.arvy@artelys.com>

open-reac/src/test/java/com/powsybl/openreac/optimization/OpenReacBranchWithOneSideOpenedTest.java

@@ -28,7 +28,7 @@
  *
  * @author Pierre ARVY {@literal <pierre.arvy at artelys.com>}
  */
-public class OpenReacBranchWithOneSideOpenedTest extends AbstractOpenReacRunnerTest {
+class OpenReacBranchWithOneSideOpenedTest extends AbstractOpenReacRunnerTest {
 
     @Test
     void testOpenLineSide1OpenReac() throws IOException {