gluon-node-info: add script to fix owner section after a run of a broken config mode

package/gluon-node-info/files/lib/gluon/upgrade/node-info/invariant/010-fixup-owner

+#!/bin/sh
+
+. /lib/functions.sh
+
+
+uci_remove gluon-node-info '@contact[0]' 2>/dev/null
+
+uci_get gluon-node-info '@owner[0]' >/dev/null || uci_add gluon-node-info 'owner'
+
+
+uci_commit gluon-node-info