Enable sauce connect addon only on SauceLabs builds
Enable sauce connect addon only on SauceLabs builds

This will improve performace of other builds, also otherwise we reach the SauceLabs concurrency tunel limit.

OndraM/php-webdriver,cedricalfonsi/php-webdriver,OndraM/php-webdriver,cedricalfonsi/php-webdriver,OndraM/php-webdriver,OndraM/php-webdriver