BUG Fix Versioned stage not persisting in Session. Fixes #962
BUG Disabled disruptive test case in DirectorTest
API RequestProcessor and VersionedRequestFilter now both correctly implement RequestFilter
Better PHPDoc on RequestFilter and implementations
Merge pull request #2918 from tractorcow/pulls/3.1-requestfilter-versioned-fixes

BUG Fix Versioned stage not persisting in Session