RFR[ 9u-dev] JDK-8072863 - Replace fatal() with vm_exit_during_initialization() when an incorrect class is found on the bootclasspath

[cheleswer sahu]

Hi,
Please review the code changes for 
https://bugs.openjdk.java.net/browse/JDK-8072863. I have built the JDK9 with 
fix successfully. As I do not have account for OpenJDK, David Buck will push
the fix into jdk9/hs-rt/.

Web review link: http://cr.openjdk.java.net/~dbuck/8072863/webrev.00/

Regards,
Cheleswer