Adding interface type to client object

This fix will allow us to pass 'os_interface' as an env variable
or as a commandline argument based on which the appropriate cue
endpoint will be used.If its not passed by default public endpoint
will be used.

Change-Id: I9c886304799a63926812f8f678016fcc0775cfa7

cueclient/osc/plugin.py

@@ -31,7 +31,7 @@ def make_client(instance):
     cls = oscutils.get_client_class(
         API_NAME, instance._api_version[API_NAME],
         API_VERSIONS)
-    return cls(session=instance.session)
+    return cls(session=instance.session, interface=instance._interface)
 
 
 def build_option_parser(parser):

cueclient/v1/client.py

@@ -23,13 +23,16 @@ class Client(object):
     def __init__(self, region_name=None, endpoint_type='publicURL',
                  extensions=None, service_type='message-broker',
                  service_name=None, http_log_debug=False, session=None,
-                 auth=None):
+                 auth=None, interface=None):
+
+        if interface is None:
+            interface = endpoint_type.rstrip('URL')
         self.session = adapter.Adapter(
             session,
             auth=auth,
             region_name=region_name,
             service_type=service_type,
-            interface=endpoint_type.rstrip('URL'),
+            interface=interface,
             user_agent='python-cueclient-%s' % version.version_info,
             version=('1'))