refs #4996 enable content plugin by default otherwise tests do not work

config/global.ini.php

@@ -670,6 +670,7 @@ Plugins[] = Insights
 Plugins[] = ZenMode
 Plugins[] = LeftMenu
 Plugins[] = Morpheus
+Plugins[] = Contents
 
 [PluginsInstalled]
 PluginsInstalled[] = Login

core/Plugin/Manager.php

@@ -85,8 +85,7 @@ class Manager extends Singleton
         'ExampleVisualization',
         'ExamplePluginTemplate',
         'ExampleTracker',
-        'ExampleReport',
-        'Contents'
+        'ExampleReport'
     );
 
     // Themes bundled with core package, disabled by default

plugins/Contents/Columns/ContentName.php

@@ -10,7 +10,6 @@ namespace Piwik\Plugins\Contents\Columns;
 
 use Piwik\Piwik;
 use Piwik\Plugin\Dimension\ActionDimension;
-use Piwik\Plugins\Contents\Actions\ActionContent;
 use Piwik\Plugins\Actions\Segment;
 use Piwik\Tracker\Action;
 use Piwik\Tracker\Request;

tests/PHPUnit/Core/MetricsTest.php

@@ -74,6 +74,8 @@ class Core_MetricsTest extends PHPUnit_Framework_TestCase
             'min_event_value' => 36,
             'max_event_value' => 37,
             'nb_events_with_value' => 38,
+            'nb_impressions' => 41,
+            'nb_interactions' => 42
         );
         $this->assertEquals($expectedMapping, $mapping);
     }