Migrate Java code to separate QL repo.

java/ql/test/query-tests/MissingOverrideAnnotation/Test.java

@@ -0,0 +1,35 @@
+import java.util.Arrays;
+import java.util.stream.Collectors;
+
+class Super {
+	int m() {
+		return 23;
+	}
+	
+	private void n() {}
+	
+	public String f() {
+		return "Hello";
+	}
+}
+
+public class Test extends Super {
+	// NOT OK
+	int m() {
+		return 42;
+	}
+	
+	// OK
+	public void n() {}
+	
+	// OK
+	@Override
+	public String f() {
+		return "world";
+	}
+	
+	public void test() {
+		// OK
+		Arrays.asList(1,2).stream().map(x -> x+1).collect(Collectors.toList());
+	}
+}