500 status code should not be considered as transient error

[BDavidRamesh]

Current Problem Statement:
the current 5XX check includes 500 which is not TransientError,
500 error requires code changes or query changes by the dev team.

1. so retry for 500 always returns 500
2. if there is dependency on Service-1 for 3 different Api calls for 3 different workflows, opening circuit for 500 error on Api-1 makes the entire Service unavailable.

Proposed Fix:
response status code should be ">500" instead of ">=500"

[savbace]

Any discussion around this a little bit controversial topic? :)