MC-40555: Add PHP 7.4 declaration

- Updated MFTF to use PHP 7.4 version
- Removed mistakenly added symlink
- Fixed ternary

Author: svera

composer.json

@@ -95,7 +95,7 @@
         "friendsofphp/php-cs-fixer": "~2.16.0",
         "lusitanian/oauth": "~0.8.10",
         "magento/magento-coding-standard": "*",
-        "magento/magento2-functional-testing-framework": "MQE-2488-php73-dev",
+        "magento/magento2-functional-testing-framework": "MQE-2501-php74-dev",
         "pdepend/pdepend": "~2.7.1",
         "phpcompatibility/php-compatibility": "^9.3",
         "phpmd/phpmd": "@stable",

composer.lock

@@ -151,9 +151,9 @@ private function runDaemonMode(QueueInterface $queue, MergerInterface $merger)
      */
     private function run(QueueInterface $queue, MergerInterface $merger, $maxNumberOfMessages)
     {
-        $count = $maxNumberOfMessages
+        $count = ($maxNumberOfMessages
             ? $maxNumberOfMessages
-            : $this->configuration->getMaxMessages() ?: 1;
+            : $this->configuration->getMaxMessages()) ?: 1;
         $transactionCallback = $this->getTransactionCallback($queue, $merger);
 
         if ($this->batchSize) {