Rework Function node module integration

packages/node_modules/@node-red/registry/lib/util.js

@@ -17,6 +17,7 @@
 const path = require("path");
 const semver = require("semver");
 const {events,i18n,log} = require("@node-red/util");
+
 var runtime;
 
 function copyObjectProperties(src,dst,copyList,blockList) {
@@ -45,13 +46,8 @@ function requireModule(name) {
         var relPath = path.relative(__dirname, moduleInfo.path);
         return require(relPath);
     } else {
-        var npm = runtime.nodes.loadNPMModule(name);
-        if (npm) {
-            return npm;
-        }
-        var err = new Error(`Cannot find module '${name}'`);
-        err.code = "MODULE_NOT_FOUND";
-        throw err;
+        // Require it here to avoid the circular dependency
+        return require("./externalModules").require(name);
     }
 }
 
@@ -129,7 +125,6 @@ function checkAgainstList(module,version,list) {
 }
 
 function checkModuleAllowed(module,version,allowList,denyList) {
-    // console.log("checkModuleAllowed",module,version);//,allowList,denyList)
     if (!allowList && !denyList) {
         // Default to allow
         return true;