Clean up comment about 404s leaking out during COPYs
Clean up comment about 404s leaking out during COPYs

Apparently that isn't a thing we have to worry about any more? Probably
got fixed when we pulled COPY out to middleware.

Add some tests where we definitely expect 403s across the board, too.

Change-Id: Idb5c0b25969b839cc71c487208447bdd6817c2cf

tipabu/swift,openstack/swift,openstack/swift,swiftstack/swift,tipabu/swift,swiftstack/swift,swiftstack/swift,openstack/swift,openstack/swift,tipabu/swift,tipabu/swift