Add services tags to scenario tests

This commit add service tags to all the test methods in the scenario
tests.

Part of bp add-service-tags

Change-Id: I9f4e125d05eeffd2dc2cbdc2b6346897166afad8
diff --git a/tempest/scenario/orchestration/test_autoscaling.py b/tempest/scenario/orchestration/test_autoscaling.py
index b31a0a7..88f2ebd 100644
--- a/tempest/scenario/orchestration/test_autoscaling.py
+++ b/tempest/scenario/orchestration/test_autoscaling.py
@@ -17,6 +17,7 @@
 from tempest.scenario import manager
 from tempest.test import attr
 from tempest.test import call_until_true
+from tempest.test import services
 
 
 class AutoScalingTest(manager.OrchestrationScenarioTest):
@@ -59,6 +60,7 @@
             self.set_resource('stack', self.stack)
 
     @attr(type='slow')
+    @services('orchestration', 'compute')
     def test_scale_up_then_down(self):
 
         self.assign_keypair()