Bulk search Elastic?

[pmlandwehr]

It might be more efficient if we hit Elastic in bulk. That is, given a list of IDs to check.

• Check each in HBase
• Set aside misses
• Check all misses at once in Elastic.

My understanding is that Elastic is relatively slow for this, so bulking might make sense.

[pmlandwehr]

Well, fixed this for image_hash(). Nothing else yet, but that's the big one.