CreateNewWikiTask

@Wikia/platform-team 

There were a couple issues when re-enabling the CreateNewWikiTask:
* The task is executed in the context of the created wiki. This was a problem because the task lived inside the CreateNewWiki extension directory, but that extension is only enabled on the www. wiki. This works in dev, but will cause task failure in preview/verify/production. This is alleviated by moving the task to includes/wikia/tasks/Tasks and putting it in the Wikia/Tasks/Tasks namespace, since tasks in that location/namespace are available to any wiki.
* When re-wiring the logging to use ```info()``` and other ```Loggable``` functions, some of the index names were accidentally changed. Oops.