Exclusion filters won't take effect with resource sharing if resource is already processed

[I3undy]

@Piedone created on Jul 3, 2014:
https://combinator.codeplex.com/workitem/60

With resource sharing enabled if you set up exclusion filters to exclude a set of resources then if that set was already processed and is saved to the resource share than exclusion filters won't take effect and the saved resource will be used.

E.g. set exclusion filter to ".*". If jQuery (let's assume there's a set of resources that solely consists of jQuery) was already processed and is saved to the resource share than it will be taken, despite the exclusion filter.