Adding test source into m2 builder (so the test dependencies are also loaded properly).

Author: krulis-martin

maven-m2-builder/ref-project/src/test/java/TestA.java

@@ -0,0 +1,8 @@
+import org.junit.jupiter.api.*;
+
+public class TestA {
+    @Test
+    public void test() {
+    }
+}
+