Enable Retries on Http calls for Saas Connectors

[earmenda]

Is your feature request related to a specific problem?

Currently our saas connectors fail when hitting a throttle from http servers without any sort of retrying.

Describe the solution you'd like

Saas connectors use the requests library to make http request. This library supports retrying on throttles but we should also consider retries at the Node level.

Describe alternatives you've considered, if any

• It is possible to handle these exceptions at the Node level
• We're also planning on working in a client side rate limiter but these can either work together or be exclusive features

Additional context

Example

import logging
import requests

from requests.adapters import HTTPAdapter, Retry

logging.basicConfig(level=logging.DEBUG)

s = requests.Session()
retries = Retry(total=5, backoff_factor=1, status_forcelist=[ 502, 503, 504 ])
s.mount('http://', HTTPAdapter(max_retries=retries))

s.get("http://httpstat.us/503")