test(eejs-blocks): update module stubs for new specifiers

Source files no longer require 'ep_etherpad-lite/node/eejs/' (trailing
slash) or 'ep_etherpad-lite/node_modules/log4js'. Update the test's
Module._resolveFilename stubs to match the new specifiers:
'ep_etherpad-lite/node/eejs' (no slash) and 'log4js'.

Author: SamTV12345

test/eejs-blocks.js

@@ -6,10 +6,10 @@ const Module = require('module');
 // Stub out ep_etherpad-lite modules that eejs-blocks.js require()s so we can
 // load the helper without a full Etherpad runtime.
 const stubs = new Map([
-  ['ep_etherpad-lite/node/eejs/', {
+  ['ep_etherpad-lite/node/eejs', {
     require: (templatePath) => `<!--rendered:${templatePath}-->`,
   }],
-  ['ep_etherpad-lite/node_modules/log4js', {
+  ['log4js', {
     getLogger: () => {
       const calls = [];
       const logger = {