Remove deprecated token_api.list_tokens

The method token_api.list_tokens was deprecated in Icehouse and
slated for removal in Juno. It was determined that the driver
version of .list_tokens was an internal method and should not
be used outside of the .delete_tokens method.

blueprint: non-persistent-tokens
Change-Id: I33e81503b1469537bbd745937bf2efe17c7ae469
Do not use lazy translation for keystone-manage

lazy translation provides the ability to translate messages to
different languages based on the request language in the HTTP
request. Since keystone-manage doesn't handle HTTP requests it
doesn't need to enable lazy translations.

Change-Id: I0abab2565b604e3325f61cad412dc8b28f768f18
Merge "Remove deprecated token_api.list_tokens"