Unhardcode allow_expired_window directive

Sets up allow_expired_window from pillar if defined

Change-Id: If83bedf3ad7dd8a57ce6aa05369bdf0e53188e85
Related-Prod: PROD-27760
(cherry picked from commit 49a50833cc96fb2eb775547af1d39a414fc2756b)
diff --git a/tests/pillar/cluster.sls b/tests/pillar/cluster.sls
index 1290fc0..30d4694 100644
--- a/tests/pillar/cluster.sls
+++ b/tests/pillar/cluster.sls
@@ -24,6 +24,7 @@
     tokens:
       engine: cache
       expiration: 86400
+      allow_expired_window: 86400
       location: /etc/keystone/fernet-keys/
     notification: false
     notification_format: cadf