Disable generating .parser.out file when running Feathub programs.

When running `nyc_taxi.py`, a `.parser.out` file would be generated in the same directory. Feathub should provide configuration options to avoid generating such log files in non-debug situations.

Start by running nyc_taxi.py and locating where the .parser.out file is generated; then inspect the parser and logging configuration. Done means non-debug Feathub runs can disable this file through a configuration option, with the behavior verified by a test.

Written by the indexing model from the issue text.