Check if IAM role already exists and then skip creating new one.

[san089]

Check if IAM role already exists and then skip creating a new one.

try:
        create_response = iam_client.create_role(
                    Path='/',
                    RoleName=role_name,
                    Description=role_description,
                    AssumeRolePolicyDocument = role_policy_document
        )
        logger.debug(f"Got response from IAM client for creating role : {create_response}")
        logger.info(f"Role create response code : {create_response['ResponseMetadata']['HTTPStatusCode']}")
    except Exception as e:
        logger.error(f"Error occured while creating role : {e}")
        return False