Generator: Elasticsearch left-right identity expression support #168
Description
Currently in Elasticsearch Generator #158 the Right side of a left-right binary expressio must be a value, not an identity. We can epress right side identities using es5 scripting.
- allow named functions to have their own converters
- create testing dataset for es and tests for current generators
- support es5 in put mappings
- left-right generation
- usage in dataux for FILTER's