Add trust-id to command line arguments

This patch enables TRUST_ID based authentication for users to try
the examples. Without this, users won't be aware of this important
parameter/feature.

Change-Id: Ide409c91d8c0530aebaef3b2682997533b639f6c

examples/common.py

@@ -289,6 +289,13 @@ def option_parser():
         default=env('OS_TOKEN', default=None),
         help='Defaults to env[OS_TOKEN]',
     )
+    parser.add_argument(
+        '--os-trust-id',
+        dest='trust_id',
+        metavar='<trust_id>',
+        default=env('OS_TRUST_ID', default=None),
+        help='Defaults to env[OS_TRUST_ID]',
+    )
     parser.add_argument(
         '--data',
         metavar='<data>',

examples/connection.py

@@ -35,6 +35,7 @@ def make_connection(opts):
         'user_domain_name': opts.user_domain_name,
         'username': opts.username,
         'password': opts.password,
+        'trust_id': opts.trust_id,
         'verify': opts.verify,
         'token': opts.token,
     }