All tests now succeed on all platforms again;

'optional' expected messages added.
expanded some tests.
Added a check if the bootclasspath supports a certain version, i.e. don't try to run a JDK7-only test if AutoClosable isn't available.

test/transform/resource/after-delombok/ValInTryWithResources.java

@@ -1,3 +1,4 @@
+//version 7:
 import java.io.IOException;
 public class ValInTryWithResources {
 	public void whyTryInsteadOfCleanup() throws IOException {