BinaryCleanupJob Fixes

- Now using the correct group when rescheduleJob is called for the BinaryCleanupJob. Prior to this change, it was impossible to reschedule the BinaryCleanupJob via property configuration.
- Changed FileUtils.isFileNewer calls to FileUtils.isFileOlder in the BinaryCleanupJob. Prior to this change, files that were newer than the configured BINARY_CLEANUP_FILE_LIFE_HOURS were deleted instead of files that were older than BINARY_CLEANUP_FILE_LIFE_HOURS.
Merge pull request #2993 from signed8bit/binarycleanupjob-fixes

BinaryCleanupJob Fixes