Add large file rename and keystone auth in tests
this check is not needed because we perform a head request to see if src is a manifest file
Create new manifest obj based on the existing one

We don't use static manifests so we don't need the query string part.
Also when creating a new manifest based on the old one, we don't need
the x-copy-from header.
make swiftclient loggin quiet running the tests
added Sokolov Ilya to the contributors list