selectBetter - Don't fail on multiple fields

[natlibfi-arlehiko]

Currently selectBetter action throws if there are more than one target fields in the preferred record. Add an option that leaves the field record untouched when there are multiple target fields and continue processing.

Configuration

{
  "773": {
    "action": "selectBetter",
    "options:" {
      "skipOnMultiple": true
    }
  }
}