MAGETWO-38838: Create composer management library and reuse it in both updater and setup wizard

- fixed code defect

Author: Ivan Gavryshko

app/code/Magento/Composer/MagentoComposerApplication.php

@@ -55,6 +55,11 @@ class MagentoComposerApplication
      */
     private $consoleArrayInputFactory;
 
+    /**
+     * @var Application
+     */
+    private $consoleApplication;
+
     /**
      * Constructs class
      *