fix timing issue with unit test fix

Author: ejizba

src/eventHandlers/WorkerInitHandler.ts

@@ -63,17 +63,14 @@ export class WorkerInitHandler extends EventHandler<'workerInitRequest', 'worker
 export function logColdStartWarning(channel: WorkerChannel, delayInMs?: number): void {
     // On reading a js file with function code('require') NodeJs tries to find 'package.json' all the way up to the file system root.
     // In Azure files it causes a delay during cold start as connection to Azure Files is an expensive operation.
-    if (
-        process.env.WEBSITE_CONTENTAZUREFILECONNECTIONSTRING &&
-        process.env.WEBSITE_CONTENTSHARE &&
-        process.env.AzureWebJobsScriptRoot
-    ) {
+    const scriptRoot = process.env.AzureWebJobsScriptRoot;
+    if (process.env.WEBSITE_CONTENTAZUREFILECONNECTIONSTRING && process.env.WEBSITE_CONTENTSHARE && scriptRoot) {
         // Add delay to avoid affecting coldstart
         if (!delayInMs) {
             delayInMs = 5000;
         }
         setTimeout(() => {
-            access(path.join(process.env.AzureWebJobsScriptRoot!, 'package.json'), constants.F_OK, (err) => {
+            access(path.join(scriptRoot, 'package.json'), constants.F_OK, (err) => {
                 if (isError(err)) {
                     channel.log({
                         message: