Adding dependency for barbican_sync_secret_stores

This patch fixes race condition occurs if barbican_sync_secret_stores
is executed but KRA cert file had not been created yet.

Change-Id: I1269dbe72547b94b539150c115b3180ae20bb9c1
Related-PROD: PROD-23601
diff --git a/barbican/server.sls b/barbican/server.sls
index 15062fd..2891274 100644
--- a/barbican/server.sls
+++ b/barbican/server.sls
@@ -213,6 +213,8 @@
   - mode: 600
   - user: barbican
   - group: barbican
+  - require_in:
+    - cmd: barbican_sync_secret_stores
 {%- endif %}
 {%- endif %}