ACPT-1224: Fix MHI for application-server PR

Author: andimov

lib/internal/Magento/Framework/ObjectManager/ObjectManager.php

@@ -36,9 +36,9 @@ class ObjectManager implements \Magento\Framework\ObjectManagerInterface
     /**
      * @param FactoryInterface $factory
      * @param ConfigInterface $config
-     * @param array $sharedInstances
+     * @param array &$sharedInstances
      */
-    public function __construct(FactoryInterface $factory, ConfigInterface $config, array &$sharedInstances = [])
+    public function __construct(FactoryInterface $factory, ConfigInterface $config, &$sharedInstances = [])
     {
         $this->_config = $config;
         $this->_factory = $factory;