The code has been moved to the new keystonemiddleware project and
keystone.middleware was deprecated since Juno. It's time to drop it in
Mitaka.
Remove the directory keystoneclient/middleware/.
Remove test_auth_token_middleware.py, test_memcache_crypt.py and
test_s3_token_middleware.py in keystoneclient/tests/unit/.
Remove the create_middleware_cert shell function from
examples/pki/gen_pki.sh. And remove the call from
examples/pki/run_all.sh.
Remove netaddr, pycrypto and WebOb test dependencies, only needed to
test the removed middleware.
Closes-Bug: #1449066
Change-Id: Iedd6887dcde62177d37e1e1988ed72bcb59c05f6
646350c1d6