On the revprop-caching-ng branch:  Always bump the generation upon
changing existing revprops - even if revprop caching has not been
enabled for the repo.

* subversion/libsvn_fs_fs/revprops.c
  (svn_fs_fs__set_revision_proplist): The criterion is that we can
                                      support caching, not that we
                                      use it. Somebody else might.

* subversion/tests/libsvn_fs_fs/fs-fs-pack-test.c
  (test_funcs): revprop_caching_on_off passes now.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/revprop-caching-ng@1619860 13f79535-47bb-0310-9956-ffa450edef68