Revert "Try initializing the MySQL environment with correct database"

This reverts commit c48cf2e.

Author: danielbachhuber

circle.yml

@@ -6,16 +6,17 @@ jobs:
     docker:
     - image: circleci/php:7.1
     - image: circleci/mysql:5.6
-      environment:
-        MYSQL_HOST: 127.0.0.1
-        MYSQL_DB: wp_cli_test
-        MYSQL_USER: wp_cli_test
-        MYSQL_PASSWORD: password1
     steps:
     - checkout
+    - run: |
+        sudo sh -c "printf '\ndeb http://ftp.us.debian.org/debian sid main\n' >> /etc/apt/sources.list"
+        sudo apt-get update
+        sudo docker-php-ext-install mysqli
+        sudo apt-get install mysql-client-5.7
     - run: |
         composer require wp-cli/wp-cli:dev-master
         composer install
+        bash bin/install-package-tests.sh
     - run: |
         echo 'export PATH=$HOME/wp-cli/package-tests/vendor/bin:$PATH' >> $BASH_ENV
         source $BASH_ENV