RFR: 8048190: NoClassDefFoundError omits original ExceptionInInitializerError [v4]

[Coleen Phillimore]

> This is a change to save the class initialization error stack trace in a hashtable and return it as the cause when NoClassDefFoundError is thrown.  The first commit is a more limited version of this that just changes the message, by adding to the message string.  The second commit is getting and saving the stack trace for the original exception, and using the thread in the message.  See CR for more details about how the message looks.
> 
> Tested with tier1-3 tests on 3 platforms.  Tier 4-6 in progress (all but two done and passed).

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Create new exception during initialization saving, so only need to save an oop. (Could potentially move to Doug's secret Class location.  If the exception is not bootstrap exception, throw EIIE instead with message of original exception.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4996/files
  - new: https://git.openjdk.java.net/jdk/pull/4996/files/a8723bab..56ff30a1

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4996&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4996&range=02-03

  Stats: 200 lines in 5 files changed: 112 ins; 61 del; 27 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4996.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4996/head:pull/4996

PR: https://git.openjdk.java.net/jdk/pull/4996