RFR: 8276208: vmTestbase/nsk/jdb/repeat/repeat001/repeat001.java fails with "AssertionError: Unexpected output" [v2]

[Jakob Cornell]

> This will fix a few issues with the tests added in #5290:
> 
> - [x] intermittent failures
> - [x] tests should use `failure` method to report problems rather than throwing `AssertionError`

Jakob Cornell has updated the pull request incrementally with one additional commit since the last revision:

  Fix incorrect use of `receiveReplyFor' causing test failures

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6182/files
  - new: https://git.openjdk.java.net/jdk/pull/6182/files/817884d9..8359ab8b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6182&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6182&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6182.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6182/head:pull/6182

PR: https://git.openjdk.java.net/jdk/pull/6182