Hi all, this series removes the remaining _supported_fs calls and replaces them with a new _exclude_fs call. The first patch removes a _supported_fs for a relatively new test from Brian that fails on other file systems. We should still run it so that people have a chance to fix the corruption, so I think this make sense. Then the ext4 directory is split so that the shared extN tests have their own directory, and then it finally does the switch over now that now many _supported_fs calls are left.
