Removed the explicit registration for JodaTime and ThreeTenBP to JSR-310 converters (originally introduced to support the unifying lookup of the last modified date in the auditing subsystem) as reading converters. This avoids the warning reporting that the source types (JodaTime and ThreeTenBP LocalDateTime) not being store-native types (which usually indicates a superfluous converter registration).
Updated the test cases to make sure these warnings aren't trigger due to test setups causing the same issue.