First attempt to set up gitlab ci

.gitlab-ci.yml

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+before_script:
+    # Install dependencies
+    - bash build/docker_install.sh > /dev/null
+
+services:
+    - mysql:latest
+    - postgres:latest
+
+variables:
+    MYSQL_DATABASE: test
+    MYSQL_USER: test
+    MYSQL_PASSWORD: test
+    POSTGRES_DB: test
+    POSTGRES_USER: test
+    POSTGRES_PASSWORD: test
+
+test:5.4:
+    image: php:5.4
+    script:
+      - phpunit -c build
+
+test:5.5:
+    image: php:5.5
+    script:
+      - phpunit -c build
+
+test:5.6:
+    image: php:5.6
+    script:
+      - phpunit -c build
+
+test:7:
+    image: php:7
+    script:
+      - phpunit -c build

build/docker_install.sh

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+#!/bin/bash
+
+# We need to install dependencies only for Docker
+[[ ! -e /.dockerenv ]] && [[ ! -e /.dockerinit ]] && exit 0
+
+set -xe
+
+# Install git (the php image doesn't have it) which is required by composer
+apt-get update -yqq
+apt-get install git -yqq
+
+# Install phpunit, the tool that we will use for testing
+curl -Lo /usr/local/bin/phpunit https://phar.phpunit.de/phpunit.phar
+chmod +x /usr/local/bin/phpunit
+
+# Install mysql driver
+# Here you can install any other extension that you need
+docker-php-ext-install pdo_mysql
+docker-php-ext-install pdo_sqlite
+docker-php-ext-install pdo_postgre
+#docker-php-ext-install pdo_oci
+docker-php-ext-install interbase