Fix license header

Author: LEDfan

src/test/java/eu/openanalytics/containerproxy/test/auth/AccessControlServiceTest.java

@@ -1,3 +1,23 @@
+/**
+ * ContainerProxy
+ *
+ * Copyright (C) 2016-2021 Open Analytics
+ *
+ * ===========================================================================
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the Apache License as published by
+ * The Apache Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ * Apache License for more details.
+ *
+ * You should have received a copy of the Apache License
+ * along with this program.  If not, see <http://www.apache.org/licenses/>
+ */
 package eu.openanalytics.containerproxy.test.auth;
 
 import eu.openanalytics.containerproxy.auth.IAuthenticationBackend;