Fix Nuxeo Drive Audit query

Nuxeo Drive gets the most recent audit Id using an inefficient query on Elasticsearch. I can see in the slow.log that these queries are taking about 2.5 seconds on a index with 948148 docs.

A matchAll() query is being used with sorting, instead we should put a filter on it.

For example, for this query it returns in 71ms on the same data.

{
  "query": { 
    "bool": { 
      "filter": [ 
        { "range": { "logDate": { "gte": "2018-03-7T00:00:00.000Z"}}} 
      ]
    }  	
  }
, "sort": { "_id": { "order": "desc" } }
, "size":1
}

If we can specify a day filter this will be cached for all users.