* Fix race condition in AWS request signers Signed-off-by: Logan Attwood <[email protected]> * Conditionally expose get_frozen_credentials on mock_session Signed-off-by: Logan Attwood <[email protected]> * Use inheritance to make tests cleaner Signed-off-by: Logan Attwood <[email protected]> --------- Signed-off-by: Logan Attwood <[email protected]>