Operation 1

@imlucas 

this parses the operation state for the operation query

the operation stats being the following: 

var operationStats = new Set([ 'keyUpdates', 'nmoved', 'nreturned', 'nscanned', 
  'nscannedObjects', 'ntoskip', 'ntoreturn', 'numYields', 'reslen']);

operations stats are non-negative integers so {0, 1, 2, ...}