Fix `column_quoted` set outside the columns loop

[jeremyyeo]

Description & motivation

Fixes #165

Also removed the double quotes in the hive_partition_uri_prefix which was causing the tests not work correctly.

Checklist

• [x] I have verified that these changes work locally
• [ ] I have updated the README.md (if applicable)
• [ ] I have added an integration test for my fix/feature (if applicable)