fix VTY tests to expect well-formed output of logging configuration

In libosmocore Change-Id Ia75c7067284ea225cffe13ca71bad05a7747ae66
we fixed the generation (saving) of logging configuration to use
one level of indent, rather than the previous broken implementation
with two levels of indent.  This means we have to adjust the VTY
test expectations here.

Change-Id: I9282a59bbfad4cfc86e86c1212c74cccfe187ff8
diff --git a/tests/test_nodes.vty b/tests/test_nodes.vty
index 95e132d..a9d4ac4 100644
--- a/tests/test_nodes.vty
+++ b/tests/test_nodes.vty
@@ -108,10 +108,10 @@
 !
 log stderr
 ...
-  logging level main notice
-  logging level db notice
-  logging level auc notice
-  logging level ss info
+ logging level main notice
+ logging level db notice
+ logging level auc notice
+ logging level ss info
 ...
 hlr
  gsup