Modify kibana-index.ndjson for Elastic 7.12.0

[petrov9]

Prerequisite: In elastic 7.12.0 changed the search way, now it uses text and keyword types.

In order to solve elastic error: "Text fields are not optimised for operations that require per-document field data like aggregations and sorting, so these operations are disabled by default. Please use a keyword field instead. Alternatively, set fielddata=true on [name] in order to load field data by uninverting the inverted index. Note that this can use significant memory",

Scripts for scripted fields are changed from doc['name'] to doc['name.keyword']