config bug fixed

add a empty config array to test app

Author: aykutfarsak

src/Aws/Laravel/AwsServiceProvider.php

@@ -35,7 +35,7 @@ public function register()
     {
         $this->app['aws'] = $this->app->share(function ($app) {
             // Instantiate the AWS service builder
-            $config = (isset($app['config']) && isset($app['config']['aws'])) ? $app['config']['aws'] : array();
+            $config = !empty($app['config']['aws']) ? $app['config']['aws'] : array();
             $aws = Aws::factory($config);
 
             // Attach an event listener that will append the Laravel version number in the user agent string

tests/Aws/Laravel/Tests/AwsServiceProviderTest.php

@@ -64,6 +64,7 @@ public function testNoConfigProvided()
     {
         // Setup the Laravel app and AWS service provider
         $app = new Application();
+		$app['config'] = array();
         $provider = new AwsServiceProvider($app);
         $app->register($provider);
         $provider->boot();