allow updating the application instance on the database manager (#37068)

Author: themsaid

src/Illuminate/Database/DatabaseManager.php

@@ -359,6 +359,19 @@ public function setReconnector(callable $reconnector)
         $this->reconnector = $reconnector;
     }
 
+    /**
+     * Set the application instance used by the manager.
+     *
+     * @param  \Illuminate\Contracts\Foundation\Application  $app
+     * @return $this
+     */
+    public function setApplication($app)
+    {
+        $this->app = $app;
+
+        return $this;
+    }
+
     /**
      * Dynamically pass methods to the default connection.
      *