zjsunit: Do not run $(...) automatically.

We have generally gone away from using $(...)
initialization in modules that we test with
zjsunit, but there are a few remaining special
cases related to our billing and portico
codebases.

frontend_tests/zjsunit/index.js

@@ -70,6 +70,7 @@ function short_tb(tb) {
 }
 
 function run_one_module(file) {
+    zjquery.clear_initialize_function();
     zjquery.clear_all_elements();
     console.info("running test " + path.basename(file, ".js"));
     test.set_current_file_name(file);