Fixes tests, that need to be in tests directory to not get build errors.

Thanks to xet7 !

tests/main.js

@@ -19,7 +19,7 @@
 
 if (Meteor.isServer) {
   describe('server', function() {
-    import '../server/lib/utils.tests';
+    import '../server/tests/utils.tests';
   });
 }