8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/speculative/Main.java

@@ -0,0 +1,15 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  On-demand symbol completion during speculative attribution round fails to report error messages
+ * @compile/fail/ref=Main.out -XDrawDiagnostics Main.java
+ */
+class Main {
+    void test() {
+        m(new A(new Object()));
+        m(new A(null));
+    }
+
+    void m(Object o) {}
+}