Move transform acl (#2021)

* Move ACL transforming into Parse Server

For the database adapters, it will be more performant and easier to work with _rperm and _wperm than with the ACL object. This way we can type it as an array and so on, and once we have stronger validations in Parse Server, we can type it as an array containing strings of length < x, which will be much much better in sql databases.

* Use destructuring

src/Adapters/Storage/Mongo/MongoCollection.js

@@ -44,18 +44,6 @@ export default class MongoCollection {
     return this._mongoCollection.count(query, { skip, limit, sort });
   }
 
-  // Atomically finds and updates an object based on query.
-  // The result is the promise with an object that was in the database !AFTER! changes.
-  // Postgres Note: Translates directly to `UPDATE * SET * ... RETURNING *`, which will return data after the change is done.
-  findOneAndUpdate(query, update) {
-    // arguments: query, sort, update, options(optional)
-    // Setting `new` option to true makes it return the after document, not the before one.
-    return this._mongoCollection.findAndModify(query, [], update, { new: true }).then(document => {
-      // Value is the object where mongo returns multiple fields.
-      return document.value;
-    });
-  }
-
   insertOne(object) {
     return this._mongoCollection.insertOne(object);
   }