Fix error-mask in db_sync state

Due to standard bash behavior construction like:
"keystone-manage db_sync; sleep 1" disguises wrong credentials error.
 sleep removed

Change-Id: I0766074d6584cb7dfd425c3d7347cacd3b36cf58
diff --git a/keystone/server.sls b/keystone/server.sls
index a1d4636..7452a80 100644
--- a/keystone/server.sls
+++ b/keystone/server.sls
@@ -211,7 +211,7 @@
 {%- if not grains.get('noservices', False) %}
 keystone_syncdb:
   cmd.run:
-  - name: keystone-manage db_sync; sleep 1
+  - name: keystone-manage db_sync && sleep 1
   - timeout: 120
   - require:
     - service: keystone_service