MAGETWO-94369: [Forwardport] Move cron improvements from 2.2 to 2.3

Author: Bohdan Korablov

app/code/Magento/Cron/Observer/ProcessCronQueueObserver.php

@@ -12,7 +12,7 @@
 use Magento\Framework\App\State;
 use Magento\Framework\Console\Cli;
 use Magento\Framework\Event\ObserverInterface;
-use \Magento\Cron\Model\Schedule;
+use Magento\Cron\Model\Schedule;
 use Magento\Framework\Profiler\Driver\Standard\Stat;
 use Magento\Framework\Profiler\Driver\Standard\StatFactory;