implements service catalog

For dashboard we used a method for getting the url for a service/class

    url_for('nova', 'internal')

You mean something like this in the ServiceCatalog class?

    def url_for(self, catalog_class, url):
        catalog = getattr(self, catalog_class)
        if catalog:
            return getattr(catalog, url + "_url")

yeah, something like that

One last thing that dashboard does: restore service catalog from session.

We put the service catalog and token (since both are returned from auth) into the user session. Then each request begins with constructing a nova/glance/keystone client using the token and the url retrieved from the service catalog.

This is just the start of refactoring the client to respect work with openstack auth ...

This allows the keystone management code (see #74) to work as:

    from novaclient import client
    conn = client.HTTPClient(USER, PASS, TENANT, KEYSTONE_URL)
    from novaclient import keystone
    kc = keystone.Client(conn)

but it should probably be more like:

    # user specifies either auth endpoint (expected)
    # - OR - service endpoint (not expected - since the endpoint has tenant)
    import novaclient
    api = novaclient.connect(USER, PASS, ENDPOINT, OPTIONAL_TENANT)
    # connect would talk to keystone, get the catalog
    # note: even in auth 1.0/1.1 you get back a "catalog" of storage & compute endpoints
    api.nova.servers.list()
    api.keystone.tenants.list()
    api.glance # should this use glance-client but pass the token?
    api.swift # should this use .....

I've pushed a branch that has start the keystone working as above ... thoughts on moving forward?

Sorry, this needs to get freshened up now that that proxy redirect branch has landed.

closing for now, 0x44 will resubmit.