Pass the --os-service-type argument to keystone

Change-Id: I099ab4f8f1d9d3ba68011170215179d26ea11aaa

monascaclient/shell.py

@@ -407,6 +407,7 @@ class MonascaShell(object):
                 'key_file': args.key_file,
                 'username': args.os_username,
                 'password': args.os_password,
+                'service_type': args.os_service_type,
                 'endpoint_type': args.os_endpoint_type
             }