Validates the mongo object ID
@param {Request Object} req
@param {Callback Function} cb
function (soajs, id, cb) {
		checkForMongo(soajs);
		
		var id1;
		try {
			id1 = mongo.ObjectId(id);
			return id1;
		}
		catch (e) {
			soajs.log.error(e);
			throw e;
		}
	}