feat: add environment variables

molecule/default/converge.yml

@@ -4,6 +4,8 @@
   roles:
     - ansible-role-gitlab_runner
   vars:
+    gitlab_runner_env_variables:
+      TEST: toto
     gitlab_runner_runners:
       - name: test
         url: https://gitlab.example.com

molecule/default/tests/test_default.py

@@ -4,6 +4,15 @@ def test_packages(host):
   package = host.package('gitlab-runner')
   assert package.is_installed
 
+def test_env_file(host):
+  path = host.file('/etc/systemd/system/gitlab-runner.service.d/ansible.conf')
+  assert path.exists
+  assert path.is_file
+  assert path.user == 'root'
+  assert path.group == 'root'
+  assert path.mode == 0o644
+  assert path.contains('Environment="TEST=toto"')
+
 def test_config_file(host):
   config = host.file('/etc/gitlab-runner/config.toml')
   assert config.exists