michaelvar

when using Elasticsearch client to add field alias. i.e: ``` es.indices.put_mapping(index="my-index", properties={ 'new-field-alias': { 'type': 'alias', 'path': 'old-field-name' } }) ``` This creates a [field alias](https://www.elastic.co/blog/introducing-field-aliases-in-elasticsearch) to field "old-field-name" called...