Allow for the 'name' parameter to be passed to list server with details

Autoscale made a change to its tests to list servers (by name) with details so it can detect if a delete command has been passed to Nova (in the vm_state), so it'd be great if server details also supported filtering by name.

Note - I'm getting a lot of doc builder failures because it looks like the openstack docs link is intermittently up and down
This code is fine, but it does suggest that maybe we want a data structure like the one described in [`txspinneret`](http://txspinneret.readthedocs.org/en/latest/query.html#query-arguments) so we don't need to do manual query-argument parsing out of `request.args`.  Just something to think about for the future.