code: function getSnapshotInfoRoute(machineName, versionKey, instanceKey, snapshotKey) {
          return getSnapshotRoute(machineName, versionKey, instanceKey, snapshotKey) + "/info.json";
      }
docs: Retrieve the snapshot's info.json path
  @method getSnapshotInfoRoute
  @param {String} machineName The name of the machine
  @param {String} versionKey The key of the version
  @param {String} instanceKey The key of the instance
  @param {String} snapshotKey The key of the snapshot
  @returns {String} The route