Run Tasks specified in profile when a site is created

#2913
Runs tasks specified in the install profile:
```php
  'og_tasks' => array(
      'vsiteTaskNewsEventsSection',
      'vsiteTaskAboutSection'
    ),
```

When the node is inserted the tasks listed in the install profile are run immediately.  If the node is created via node form then the tasks are run in batch.  If the node is created via ajax in "site/register" then the tasks are run in serial in the background.