test(Integration): add retry for 503 to test ApiClient
test(Integration): add retry for 503 to test ApiClient

sphereio/sphere-php-sdk,sphereio/sphere-php-sdk,sphereio/sphere-php-sdk,sphereio/commercetools-php-sdk,sphereio/commercetools-php-sdk,sphereio/commercetools-php-sdk,sphereio/sphere-php-sdk,sphereio/commercetools-php-sdk