GPMONGODB-7: DatastoreUnitTestMixin Tests fail on get() and findBy*() fail when using String IDs

[graemerocher]

Original Reporter: dan_lynn
Environment: Not Specified
Version: Not Specified
Migrated From: http://jira.grails.org/browse/GPMONGODB-7

See attached bug report.

grails test-app unit:

[graemerocher]

burtbeckwith said:
Fixed by https://github.com/SpringSource/spring-data-mapping/commit/4900739766de5178215f9d309fa071d63ac3c37c