Support UDFs for internal plugins
Fix code style errors in tests
Enable Checkstyle for tests
Fix thread safety for FunctionRegistry
Fix handling of non-splittable files without blocks
Fix hive connector semaphore release bug
Add 0.58 release notes
[maven-release-plugin] prepare release 0.58
[maven-release-plugin] prepare for next development iteration
Fix hang in hive split source

Correctly decrement the outstandingSplitCount in getNextBatch