Use object manager to pass unit tests

lib/internal/Magento/Framework/App/Bootstrap.php

@@ -107,13 +107,6 @@ class Bootstrap
      */
     private $factory;
 
-    /**
-     * Logger
-     *
-     * @var LoggerInterface
-     */
-    private $logger;
-
     /**
      * Static method so that client code does not have to create Object Manager Factory every time Bootstrap is called
      *
@@ -214,7 +207,6 @@ public function __construct(ObjectManagerFactory $factory, $rootDir, array $init
         $this->rootDir = $rootDir;
         $this->server = $initParams;
         $this->objectManager = $this->factory->create($this->server);
-        $this->logger = $this->objectManager->create(LoggerInterface::class);
     }
 
     /**
@@ -267,7 +259,7 @@ public function run(AppInterface $application)
                 \Magento\Framework\Profiler::stop('magento');
             } catch (\Exception $e) {
                 \Magento\Framework\Profiler::stop('magento');
-                $this->logger->error($e->getMessage());
+                $this->objectManager->get(LoggerInterface::class)->error($e);
                 if (!$application->catchException($this, $e)) {
                     throw $e;
                 }