docs/detailed_test_config.rst: fix the sample yaml
so it is able to work with latest teuthology
@@ -43,6 +43,7 @@ the nodes & use the live cluster ad hoc), might look like this::
- ceph:
- ceph-fuse: [client.0]
- interactive:
+ repo: git://git.ceph.com/ceph.git
The number of entries under ``roles`` and ``targets`` must match.
