Improved RackSpace configuration support (needed by latest version of rackspace API)

plugins/inventory/nova.ini

@@ -11,15 +11,19 @@ username      =
 api_key       =
 
 # OpenStack nova auth_url
-# For use with the new RackSpace API use https://identity.api.rackspacecloud.com/v2.0/
 auth_url      =
 
+# Authentication system
+auth_system =
+
 # OpenStack nova project_id
-project_id    = None
+project_id    = 
+
+# Serverarm region name to use
+region_name   =
 
 # TODO: Some other options
 # insecure      =
-# region_name   =
 # endpoint_type =
 # extensions    =
 # service_type  =

plugins/inventory/nova.py

@@ -99,7 +99,9 @@ client = nova_client.Client(
     username    = config.get('openstack', 'username'),
     api_key     = config.get('openstack', 'api_key'),
     auth_url    = config.get('openstack', 'auth_url'),
-    project_id  = config.get('openstack', 'project_id')
+    region_name = config.get('openstack', 'region_name'),
+    project_id  = config.get('openstack', 'project_id'),
+    auth_system = config.get('openstack', 'auth_system')
 )
 
 if len(sys.argv) == 2 and (sys.argv[1] == '--list'):