Add the script that can repeatedly scrapes the coursebook until finished

[mikehquan19]

Currently we have -resume flag for coursebook scraper that can resume scraping the coursebook until it scrapes everything. Check it out if you haven't yet.
To take a step further in automating the coursebook scraper in GCP, add the shell script that will repeatedly call the coursebook scraper with resume flag (in case it is terminted halfway) until every course is scraped successfully.

Make sure to put the limit on the number of attemps it can recall the resume.

[justinschwerdtfeger]

I have a few exams coming up, so I probably won't make any progress on this for a few weeks. If this needs to be done sooner than that, it might be best to assign to someone else.