MAGETWO-93701: Make cron:run CLI command react on cron disable configuration

Author: NadiyaS

app/code/Magento/Cron/Console/Command/CronCommand.php

@@ -10,6 +10,7 @@
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Input\InputOption;
+use Magento\Framework\App\ObjectManager;
 use Magento\Framework\App\ObjectManagerFactory;
 use Magento\Store\Model\Store;
 use Magento\Store\Model\StoreManager;
@@ -51,7 +52,9 @@ public function __construct(
         DeploymentConfig $deploymentConfig = null
     ){
         $this->objectManagerFactory = $objectManagerFactory;
-        $this->deploymentConfig = $deploymentConfig;
+        $this->deploymentConfig = $deploymentConfig ?: ObjectManager::getInstance()->get(
+            DeploymentConfig::class
+        );
         parent::__construct();
     }