Add container-sync and object-sync sections

For some reason, swift-storage "swift-init all start" is now refusing 
to start without "[container-sync]" in 
/etc/swift/container-server.conf.  No idea why.
  
object-sync doesn't appear to be needed, but comes along for the ride 
because it's easy in the current charm hook layout.

hooks/swift-storage-node-common

@@ -61,7 +61,7 @@ function create_server_conf {
 # $1 should be: account, container or object
 case $1 in
   "account") subconf="replicator auditor reaper" ;;
-  "object"|"container") subconf="replicator updater auditor" ;;
+  "object"|"container") subconf="replicator updater auditor sync" ;;
 esac
 cat >/etc/swift/$1-server.conf <<EOF
 [DEFAULT]

revision

@@ -1 +1 @@
-29
+30