RFR(L): 8172218: Use Java class loaders for creating the AppCDS archive

[Calvin Cheung]

Please review this RFE change for jdk10.

bug: https://bugs.openjdk.java.net/browse/JDK-8172218
webrev: http://cr.openjdk.java.net/~ccheung/8172218/webrev.00/

I've put the fix description in the comment section 
<https://bugs.openjdk.java.net/browse/JDK-8172218?focusedCommentId=14112876&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14112876> 
of the bug report.

Testing:
     Running test on all hotspot components 
(hotspot_compiler,hotspot_gc,hotspot_runtime,hotspot_serviceability,hotspot_misc).
     Will run tier1 to tier4 and selected JCK tests.

thanks,
Calvin