Refactor oauth1 code for updates

The keystoneclient code for oauth1 support has changed.
As such, we should remove the delete, list and authenticate
functions, since they are not in keystoneclient.

Also, we must now pass in the project id when creating a
request token. Additionally we must now pass in roles
when authorizing a request token.

Added functional tests to ensure output and input args
are the same.

bp add-oauth-support
Change-Id: I559c18a73ad95a0c8b7a6a95f463b78334186f61
Merge "Refactor oauth1 code for updates"