Github user MikeThomsen commented on the issue:
https://github.com/apache/nifi/pull/2896
@zenfenan the reason I asked you to do this one first before I reopen 5333
is that I realized it contains updates to the controller service and
configuration properties that are required to smooth out the behavior in 5333.
The GetMongoRecord processor is going to be controller service-only for
configurations like the GridFS processors waiting in review.---
