Ability to specify alternative default retry for botocore max_attempts due to RequestLimitExceeded scenarios

[tangerinedream]

When boto hits a RateLimitExceeded, it uses exponential backoff. However, the issue can persist as the default retry attempt is set to 5. Using the code below, that default may be changed to any reasonable value, in this example 10.

This could be a configurable value in DynamoDB or hard coded (less desirable). If configurable, each Session have it's own value, although that is likely overengineering.

The code below appears to require boto/botocore version 1.6.0

Please refer to: boto/botocore#1260

from botocore.session import Session
from botocore.config import Config

s = Session()
# Will retry any method call at most 10 times
c = s.create_client('s3', config=Config(retries={'max_attempts': 10}))

[tangerinedream]

Addressed via e9b482a