Try to make unit test finish on travis-ci

.travis.yml

@@ -15,3 +15,6 @@ addons:
   apt:
     packages:
     - nodejs
+# some unit tests behave differently with other
+env:
+  - de_CH.UTF-8 LANGUAGE=de_CH

src/util/resilient_loop.rb

@@ -84,6 +84,7 @@ def get_state
       end
     end
     def save_state(state)
+      FileUtils.mkdir_p File.dirname(@state_file)
       File.open(@state_file, 'w+') { |f| f.write(state)}
     end
     def clear_state

test/test_util/resilient_loop.rb

@@ -17,6 +17,7 @@ def setup
 
     def teardown
       @r_loop.finished
+      super
     end
 
     def test_full_loop_no_problem