test refactoring

runner/cmd_test.go

runner/config_test.go

runner/fixtures/f1/base/postgres.yml

runner/fixtures/f1/base/ytt/patch1.yml

runner/fixtures/f1/environments/ns1/beaver.yml

runner/fixtures/f1/environments/ns1/pipelines/pipe.json

runner/fixtures/f1/environments/ns1/ytt/patch1.yml

runner/fixtures/f1/vendir.yml

runner/fixtures/f1/vendor/helm/postgresql/Chart.yaml

...tures/f1/vendor/helm/postgresql/templates/deployment.yaml

runner/fixtures/f1/vendor/helm/postgresql/values.yaml

runner/fixtures/f1/vendor/ytt/odoo/deployment.yaml

runner/fixtures/f1/vendor/ytt/odoo/values.yaml