RFR(XXS) - JDK-8009539 - JVM crash when run lambda testng tests

[Bharadwaj Yadavalli]

Please review the change whose details are as follows:

Summary of the change: No class is associated with array classes of 
bottom type. Dereferencing a null class to test to test if it is 
unloaded results in segmentation violation. Further there is no need to 
test if such classes were not loaded. Added a check to ensure that NULL 
pointer is not dereferenced.

Webrev: http://cr.openjdk.java.net/~bharadwaj/8009539/webrev/
Bug fixed: https://jbs.oracle.com/bugs/browse/JDK-8009539

Thanks,

Bharadwaj