KNIFE-281: update knife to pass knife's https_proxy and http_proxy setting onto fog; added the ability to specify ssl_verify_peer
Merge branch 'KNIFE-281' of git://github.com/rackerlabs/knife-rackspace into test_runner
Image list tests, plus filtering some more transient data.
Server management (create/list/delete) test
Updated VCR placeholders to be more URL friendly