Bug 1506554 part 2 - Actually call cleanupLocaleTests in...

Bug 1506554 part 2 - Actually call cleanupLocaleTests in storage/test/unit/test_locale_collation.js. r=asuth

The cleanup function was there but never called, as far as I can see.

Differential Revision: https://phabricator.services.mozilla.com/D11617

--HG--
extra : moz-landing-system : lando

storage/test/unit/test_locale_collation.js

@@ -287,4 +287,5 @@ function run_test() {
     print("-- Running test: " + test.desc);
     test.run();
   });
+  cleanupLocaleTests();
 }