[#192] Added python scripts for news fetcher

[alvyn279]

• Added CLI program that scrapes StockNewsAPI given a date range
• Batch writing into DB that must be ran in docker container in parallel
• Addeds few tests
• Requires a keys.py file containing API key in root dir of news/

** Will only scrape based on the instruments that are found in the graphelier-db

TODO: add keys.py on prod under graphelier/news/scripts/

Sample command:

python news_fetcher.py 01-29-2020 02-02-2020

[Lercerss]

Can you add a sample keys.py with a mock key to show the format expected? A bit like how projects usually include a .env.example

[alvyn279]

Can you add a sample keys.py with a mock key to show the format expected? A bit like how projects usually include a .env.example

I added its format in the news README, is that fine ?

[Lercerss]

That works

[Lercerss]

Can we increase the coverage on https://1807-206399552-gh.circle-artifacts.com/0/htmlcov/news_fetcher_py.html? It's a bit low at 52%

[alvyn279]

Can we increase the coverage on https://1807-206399552-gh.circle-artifacts.com/0/htmlcov/news_fetcher_py.html? It's a bit low at 52%

Updated PR, 76% coverage on relevant code is the best I could get up to in news_fetcher with dependency injection