FIX pom.xml check license

pom.xml

@@ -211,7 +211,7 @@
                         <licenseSet>
                             <header>com/mycila/maven/plugin/license/templates/SSPL-1.txt</header>
                             <properties>
-                                <project.inceptionYear>2018</project.inceptionYear>
+                                <year>2018</year>
                                 <owner>Airbus CyberSecurity (SAS)</owner>
                             </properties>
                             <includes>

src/test/java/org/graylog2/plugin/TestMessageFactory.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2018 Airbus CyberSecurity (SAS)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the Server Side Public License, version 1,
+ * as published by MongoDB, Inc.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * Server Side Public License for more details.
+ *
+ * You should have received a copy of the Server Side Public License
+ * along with this program. If not, see
+ * <http://www.mongodb.com/licensing/server-side-public-license>.
+ */
 package org.graylog2.plugin;
 
 import java.util.Map;