Add horizon tempest test to smoke group

test_basic_scenario should run in smoke set

Change-Id: Ife5abf3afabc4f44be3daed22279edc5e96b5bdb
diff --git a/tempest_horizon/tests/scenario/test_dashboard_basic_ops.py b/tempest_horizon/tests/scenario/test_dashboard_basic_ops.py
index cd4af56..d928a1e 100644
--- a/tempest_horizon/tests/scenario/test_dashboard_basic_ops.py
+++ b/tempest_horizon/tests/scenario/test_dashboard_basic_ops.py
@@ -133,6 +133,7 @@
     def _ssl_default_context_supported(self):
         return (hasattr(ssl, 'create_default_context'))
 
+    @decorators.attr(type='smoke')
     @decorators.idempotent_id('4f8851b1-0e69-482b-b63b-84c6e76f6c80')
     def test_basic_scenario(self):
         creds = self.os_primary.credentials