@adrianjgeorge I was thinking the same thing, but didn't want to make too many changes in one pull request.  There probably is a better location for filter-bundle that doesn't need to belong with filters.  Also, a future refactor could include moving the api-validator under filters and its corresponding extensions-filter-bundle to wherever bundles are relocated.

As for now.... I'm good with keeping it under filters and moving with a different pull request.