Add file check for offline db sync

Check file `loggin.conf` in work dir, if logging enable

Change-Id: I2525397a7928ec6633d06b3d7362a86ad56e8337
Related-Prod: PROD-22741 (ROD-22741)
diff --git a/keystone/server.sls b/keystone/server.sls
index c2a9eba..2a763bd 100644
--- a/keystone/server.sls
+++ b/keystone/server.sls
@@ -145,6 +145,8 @@
     - defaults:
         service_name: keystone
         _data: {{ server.logging }}
+    - require_in:
+      - sls: keystone.db.offline_sync
     - require:
       - pkg: keystone_packages
 {%- if server.logging.log_handlers.get('fluentd', {}).get('enabled', False) %}