fix typo

Author: Tristan-WorkGH

src/main/java/org/gridsuite/securityanalysis/server/service/SecurityAnalysisObserver.java

@@ -4,7 +4,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
-
 package org.gridsuite.securityanalysis.server.service;
 
 import com.powsybl.loadflow.LoadFlowResult;

src/test/java/org/gridsuite/securityanalysis/server/service/SecurityAnalysisResultServiceTest.java

@@ -4,7 +4,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
-
 package org.gridsuite.securityanalysis.server.service;
 
 import com.vladmihalcea.sql.SQLStatementCountValidator;