Support for TIMESTAMP data type in Configuration Recommendation Engine

[moszutij]

When I run the configuration recommendation engine on a schema that contains a field with a TIMESTAMP data type, the following error is thrown:

{ "_code": 400, "_error": "java.lang.IllegalArgumentException: Time column can be only INT or LONG: TIMESTAMP" }

The TimeGenerator class doesn’t support a TIMESTAMP data type and hence throws the validation error.