tree e874663e553b91132b133cdfcd8d0c85a93fb113
parent 54881f86e4392bb0e255ad97ebc6ad5735476998
author Samuel A. Falvo II <sam.falvo@rackspace.com> 1373931712 -0700
committer Samuel A. Falvo II <sam.falvo@rackspace.com> 1373931712 -0700

Ensure authenticate never re-auths.

Other API functions will support re-auth as a matter of course.
If an auth token expires, we need to re-authenticate to acquire a new
token.  If re-authentication were itself to attempt re-auth, we
would end up in an endless loop.

If after authenticating gophercloud receives a 401 Unauthorized
response, then we must assume that the provided credentials are
incorrect.