Fix blackfire inegration test

Author: Igor Vitol

src/Test/Integration/_files/cloud_base/docker-compose.exp.yml

@@ -123,7 +123,7 @@ services:
     image: 'magento/magento-cloud-docker-php:7.3-cli-1.2.0'
     env_file: ./.docker/config.env
     environment:
-      - 'PHP_EXTENSIONS=bcmath bz2 calendar exif gd gettext intl mysqli pcntl pdo_mysql soap sockets sysvmsg sysvsem sysvshm opcache zip redis xsl sodium'
+      - 'PHP_EXTENSIONS=bcmath bz2 calendar exif gd gettext intl mysqli pcntl pdo_mysql soap sockets sysvmsg sysvsem sysvshm opcache zip blackfire redis xsl sodium'
   build:
     hostname: build.magento2.docker
     image: 'magento/magento-cloud-docker-php:7.3-cli-1.2.0'