delete backend old check results

var date = new Date();
var daysToDeletion = 120;
var deletionDate = new Date(date.setDate(date.getDate() - daysToDeletion));

printjson(deletionDate);

var db = db.getSiblingDB('alignak-backend')
db.getMongo().setSlaveOk();

// logcheckresult and/or history are candidates to deletion
printjson(db.logcheckresult.find({insertDate : {$lt : deletionDate}}).count());

//delete old logcheckresult:
db.logcheckresult.remove({insertDate : {$lt : deletionDate}});