8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/defaultMethods/Pos02.java

@@ -25,7 +25,7 @@
  * @test
  * @summary test for explicit resolution of ambiguous default methods
  * @author  Maurizio Cimadamore
- * @compile -XDallowDefaultMethods Pos02.java
+ * @compile Pos02.java
  */
 
 class Pos02 {