Enable test_post_checkout

Change-Id: Ie668f0b5d6155b8bcccd5b529705fdb6161825f9
diff --git a/tests/fixtures/layouts/repo-checkout-post.yaml b/tests/fixtures/layouts/repo-checkout-post.yaml
new file mode 100644
index 0000000..bf02c6d
--- /dev/null
+++ b/tests/fixtures/layouts/repo-checkout-post.yaml
@@ -0,0 +1,16 @@
+- pipeline:
+    name: post
+    manager: independent
+    trigger:
+      gerrit:
+        - event: ref-updated
+          ref: ^(?!refs/).*$
+
+- job:
+    name: integration
+
+- project:
+    name: org/project1
+    post:
+      jobs:
+        - integration