**- Why I did it**
Align style with slightly modified PEP8 standards (extend maximum line length to 120 chars). This will also help in the transition to Python 3, where it is more strict about whitespace, plus it helps unify style among the SONiC codebase. Will tackle other directories in separate PRs.
**- How I did it**
Using `autopep8 --in-place --max-line-length 120` and some manual tweaks.
- Convert to Python 3
- Fix bug: `CORE_FILE_DIR` previously was set to `os.path.basename(__file__)`, which would resolve to the script name. Fix this by hardcoding to `/var/core/` instead
- Remove locally-define logging functions; use Logger class from sonic-py-common instead
* [cron.d] Create cron job to periodically clean-up core files
* Create script to scan /var/core and clean-up older core files
* Create cron job to run clean-up script
Signed-off-by: Danny Allen <daall@microsoft.com>
* Update interval for running cron job
* Respond to feedback
* Change syslog id
