add license headers

common/addons/structure-terrascript-loader/src/test/java/structure/LookaheadTest.java

@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package structure;
 
 import org.junit.jupiter.api.Test;

common/addons/structure-terrascript-loader/src/test/java/structure/ParserTest.java

@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package structure;