svn_fs: now re-use all tests, this time on the `SvnCachedRepository`.
This is 72 tests in one go! Ok, I cheated for 3 of them which should really be "skipped" in the cached repository case, so this may need a further clean-up.
Authored by: cboos 2010-02-26
Parent: [r9294]
Child: [r9296]
