tests: Add render.init() to node tests.

This makes sure we are explicit about partials in
individual test modules.  Eventually, we should figure
out a way to make partials automatically compile as
part of the node tests.

frontend_tests/node_tests/templates.js

@@ -641,6 +641,8 @@ function render(template_name, args) {
 }());
 
 (function stream_sidebar_row() {
+    global.use_template('stream_privacy'); // partial
+
     var args = {
         name: "devel",
         color: "red",

frontend_tests/zjsunit/index.js

@@ -39,6 +39,7 @@ files.forEach(function (file) {
     global.patch_builtin('setInterval', noop);
 
     console.info('running tests for ' + file.name);
+    render.init();
     require(file.full_name);
     namespace.restore();
 });

frontend_tests/zjsunit/render.js

@@ -10,6 +10,10 @@ function template_dir() {
     return __dirname + '/../../static/templates/';
 }
 
+exports.init = function () {
+    Handlebars.templates = {};
+};
+
 exports.make_sure_all_templates_have_been_compiled = function () {
     var dir = template_dir();
     var fns = fs.readdirSync(dir).filter(function (fn) {