Use keystoneclient.exceptions

keystoneclient.apiclient.exceptions is deprecated.
Instead keystoneclient.exceptions should be used.

Change-Id: I546defeac5c2a1f4d3e68885e45019a6a6ecb027
Use token and discovery fixture in identity tests

Replace a bunch of copied token data by using the fixtures available in
client.

Change-Id: Iec2e75cb4ffe9cec0396e9d8ec21a5e3c6816af7
Merge "Use keystoneclient.exceptions"
Add docs for how to create an OAuth auth instance

Similar to the other authentication methods that were documented,
like password and token, this patch will add a brief description
on how to authenticate with the oauth1 plugin.

Change-Id: I1b7cceb116d337be71576139601f34ca17563a50
Merge "Use token and discovery fixture in identity tests"
Merge "Add docs for how to create an OAuth auth instance"