RFR: 8305714 : Add an extra test for JDK-8292755 [v3]

[Weibing Xiao]

> Add a testing case for undefined classes in Java JShell to make sure JShell does not crash when an undefined class is used.
> 
> This test was passed for Linux, MacOS, and Windows by mach5 build and test in Oracle.
> 
> Reviewer: @coffeys @lahodaj

Weibing Xiao has updated the pull request incrementally with two additional commits since the last revision:

 - add an empty to see if remote repo got updated
 - update according to the comment

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/13719/files
  - new: https://git.openjdk.org/jdk/pull/13719/files/5750a105..36e72a6f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13719&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13719&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13719.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13719/head:pull/13719

PR: https://git.openjdk.org/jdk/pull/13719