Schema option case sensitivity

[willbryant]

Docs say you can use:

    dbt_schema_excludes:
      - development
      - testing

And there's also support for a --dbt_schema_excludes command-line option.

However, you must actually upcase the schema name, unlike the example before, because the code that actually looks at this is:

if schema_excludes and node["schema"].upper() in schema_excludes:

I'm not really clear why the upper() is there. If it's just for the sake of normalising, then we also need to normalise the arguments?

[gouline]

That's a bug. The point was to make them case insensitive, except it's forgetting to first make schema_excludes all the same case. The parameters includes and excludes are a good example, except they're inconsistent between manifest and folder parsers too. I'll look into making all three consistent.