(PDB-3611) Reduce batch size for fact value rehashing
(PDB-3611) Reduce batch size for fact value rehashing

5000 felt like it was too big, could OOM with large facts.

puppetlabs/puppetdb,rbrw/puppetdb,rbrw/puppetdb,rbrw/puppetdb,mullr/puppetdb,mullr/puppetdb,mullr/puppetdb,rbrw/puppetdb,rbrw/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb