do not update the 'updated' timestamp when updating the 'enacted' timestamp otherwise 'updated' will always be larger than 'enacted'
diff --git a/planetstack/openstack/driver.py b/planetstack/openstack/driver.py
index 530d93b..4c0791e 100644
--- a/planetstack/openstack/driver.py
+++ b/planetstack/openstack/driver.py
@@ -312,9 +312,9 @@
         if not security_group:
             security_group = self.config.nova_default_security_group 
 
-        #authorized_keys = "\n".join(pubkeys)
-        #files = {'/root/.ssh/authorized_keys': authorized_keys}
         files = {}
+        if pubkeys:    
+            files['/root/.ssh/authorized_keys'] = "\n".join(pubkeys)
        
         hints = {}
         availability_zone = None