FIx E2E test util method (#2329)

e2e/modules/utils.js

@@ -30,7 +30,10 @@ function dirExistsAsync(path) {
 function mkDirAsync(path) {
     return new Promise((resolve, reject) => {
         dirExistsAsync(path).then((exists) => {
-            if (!exists) {
+            if (exists) {
+                resolve();
+                return;
+            }
             fs.mkdir(path, {recursive: true}, (error) => {
                 if (error) {
                     reject(error);
@@ -38,7 +41,6 @@ function mkDirAsync(path) {
                 }
                 resolve();
             });
-            }
         }).catch((err) => {
             reject(err);
         });