BulkUpdateByType returns an invalid reflect value

[kpelzel]

BulkUpdateByType creates a NewStateChangeEvent, but passes in an empty reflect value. This will result in the debug message containing an invalid reflect value.

https://github.com/hpc/kraken/blob/9dacb64ab6b0eaee8d8971e3fbcbd23f70a6c426/core/StateDifferenceEngine.go#L530

[jlowellwofford]

This is actually pretty bad. It's because, unlike other events, it just passes an empty value. This is because it relies on the diff to generate events, and it would make the function a little heavier to get all of those values, but we should do it anyway...