For some reason, when we switched from py36 on centos8 to py39 on
centos9, these two tests started failing. Looks like a disagreement
about whether the canonical path for a bucket request should have
a trailing slash or not.
Mark them as known-failures for now so we can stay aware of any
other new breakage brought on by swift code changes.
Related-Change: I4f6b9c07af7bc768654f1a5d0c66b048e0f2c9c1
Change-Id: If990752c7ef7667182dbe18e49679e48c0e3d42d
5be20f46df