When a Connection is first __init__ialized (without providing a
preauthurl or preauthtoken), the url and token attributes are None; they
get set (to be reused on future requests) after one of the wrapper
methods internally using _retry (head_account, get_container,
put_object, and similar friends) is called. However, this had not been
the case for get_auth, much to the momentary confusion and
disappointment of programmers using swiftclient who expected to be able
to get the token or storage URL off the Connection object after calling
get_auth (perhaps in order to make an unusual kind of request that
swiftclient doesn't already have a function for). This commit makes
get_auth set the url and token attributes as one might expect.
Change-Id: I0d9593eb5b072c8e3fa84f7d5a4c948c0bc6037a
3cd1faa7af