PR for #6866 - Allow console specific view manager configuration

Allow to override "display_exceptions" and "display_not_found_reason" for Console ViewManager #6866
Is there any use case for using `ConsoleViewManager` in the http context? I can´t imagine one. https://github.com/zendframework/zf2/blob/master/library/Zend/Mvc/Service/ViewManagerFactory.php#L28 is checking for the console context right now.

I thought supporting the current configuration key, will not cause a breaking change, because 
The default configuration for `displayNotFoundReason` and `displayExceptions` is set to true: https://github.com/zendframework/zf2/blob/master/library/Zend/Mvc/View/Console/ExceptionStrategy.php#L25 and https://github.com/zendframework/zf2/blob/master/library/Zend/Mvc/View/Console/RouteNotFoundStrategy.php#L38. Otherwise we could just remove the `$config['view_manager]` check or solve it within the factory. I am not very familiar how use usally handle this problems.