Log expected and generated snippets

Author: michaelklishin

src/rabbit_ct_config_schema.erl

@@ -76,6 +76,7 @@ test_snippet(Config, Snippet, Expected, _Plugins) ->
     case Exp of
         Gen -> ok;
         _         ->
+            ct:pal("Expected: ~p, generated: ~p", [Exp, Gen]),
             error({config_mismatch, Snippet, Exp, Gen})
     end.