Code review comment for lp:~pbeaman/akiban-persistit/fix-several-small-bugs

VolumeStorageV2#updateMetaData - good catch - forgot to change it back after an experiment.

ExchangeTest#traverseEQfalse0 - good catch on not testing the transaction case. Changed the names, added a transactional version, and also tests for both true and false values of the 'deep' parameter.

Persistit#close() no longer calls stopCopier - yes, there is a change. The JOURNAL_COPIER thread used to be responsible for various cleanup activities and therefore had to be stopped early. That is no longer the case, so JournalManager#close() is where the copier now gets stopped.