fix error type in ReadNode when file was not found

The method ReadNode in the ocis storage didn't return the error type NotFound when a file was not found.

Signed-off-by: David Christofas <dchristofas@owncloud.com>

changelog/unreleased/readnode-error-type.md

@@ -0,0 +1,6 @@
+Bugfix: Fix error type in read node when file was not found 
+
+The method ReadNode in the ocis storage didn't return the error type NotFound when a file was not found.
+
+https://github.com/cs3org/reva/pull/323
+

changelog/unreleased/update-grants-on-share-update.md

@@ -2,4 +2,4 @@ Bugfix: update share grants on share update
 
 When a share was updated the share information in the share manager was updated but the grants set by the storage provider were not.
 
-https://github.com/cs3org/reva/pull/1258
+https://github.com/cs3org/reva/pull/1294

pkg/storage/fs/ocis/node.go

@@ -183,7 +183,7 @@ func ReadNode(ctx context.Context, lu *Lookup, id string) (n *Node, err error) {
 		} else {
 			log.Error().Err(err).Interface("node", n).Str("root.ID", root.ID).Msg("ReadNode()")
 			if isNotFound(err) {
-				return
+				return nil, errtypes.NotFound(err.Error())
 			}
 			return
 		}