Actually delete bucket data files

I'd made this fix already but neglected to check it in

Change-Id: I255b630b1c4c011a3ea5db2822150c4a9a73e6dd
Reviewed-on: http://review.northscale.com/3127
Tested-by: Steve Yen <steve.yen@gmail.com>
Reviewed-by: Steve Yen <steve.yen@gmail.com>

src/ns_orchestrator.erl

@@ -218,7 +218,7 @@ janitor_running(_Event, State) ->
 %% Synchronous idle events
 idle({create_bucket, BucketType, BucketName, NewConfig}, _From, State) ->
     Reply = case ns_bucket:get_bucket(BucketName) of
-                false ->
+                not_present ->
                     %% Delete any leftover files.
                     rpc:multicall(ns_node_disco:nodes_actual_proper(),
                                   ns_storage_conf,