Fix context comparison problem

oslo.context introduced a 'is_admin_project' property recently. This
patch fixes the comparison of context as dicts.

Change-Id: Ica334204ae9ab0dcfe1999fe8b4daf290736be4b

senlin/tests/unit/test_common_context.py

@@ -31,6 +31,7 @@ class TestRequestContext(base.SenlinTestCase):
             'project_domain': 'project-domain-id',
             'project_domain_name': 'a project domain',
             'is_admin': False,
+            'is_admin_project': True,
             'password': 'foo',
             'show_deleted': False,
             'read_only': False,