RFR(L): 8186842: Use Java class loaders for creating the CDS archive

[Calvin Cheung]

Hi,

This is a re-post of a previous RFR for 8172218 using the correct bug id.

bug: https://bugs.openjdk.java.net/browse/JDK-8186842

webrev: http://cr.openjdk.java.net/~ccheung/8186842/webrev.00/

Please refer to the comment 
<https://bugs.openjdk.java.net/browse/JDK-8186842?focusedCommentId=14113187&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14113187> 
section of the bug for description of the change.

Tests executed so far:
     JPRT
     hs-tier2 though hs-tier4
     hs-tier5 (linux-x64)

thanks,
Calvin