(fix) Firehose all entities saving properly

This iteration of the firehose does a bunch of things.

It properly saves videos, images and blogs to both elasticsearch and cassandra.

Finally got the mappings working properly. moderated entities will update elasticsearch with moderator_guid and @moderated

We need to insert the object:blog, object:video and object:image fields in their respective types in elasticsearch (calls are in postman)

I have also updated the elasticsearch_provisioner to add those fields for development