Fix unblocking/unfiltering in elasticsearch

[jackrobison]

After abandoning a blocking/filtering channel, the blocked/filtered claims don't get unblocked/unfiltered.

Reported by @tzarebczan

[shyba]

curl -X POST "localhost:9200/claims/_update_by_query?pretty" -H 'Content-Type: application/json' -d'
{
  "script": {
    "source": "ctx._source.censor_type=0; ctx._source.censoring_channel_id=null;",
    "lang": "painless"
  },
  "query": {
    "term": {
      "channel_id": "x"
    }
  }
}
'

this query was used to manually do it, we could use something similar but querying for another field

[tzarebczan]

It does resolve, just won't return in claim search.