Lightning: add to feature to validate / determine header configuration of csv import

[fubinzh]

Feature Request

Is your feature request related to a problem? Please describe:

When lightning import CSV, it is possible mydumper.csv.header configuration is not correct ( header is true while there is no header, or vice versa)
In this case, lightning import might import data incorrectly, and finally fails at checksum phase. We should try to validate or determine this configuration to avoid mistakes.

Describe the feature you'd like:

Try to validate / determinze header configuration of csv import

Describe alternatives you've considered:
N/A

Teachability, Documentation, Adoption, Migration Strategy:
N/A