Fix aodh service name check in tempest tests

The service name is aodh, not aodh_plugin, other projects like
tripleo are having these tests skipped because of this.

Change-Id: If288c261a74e7abd5237041d01fa78b2207b5d33
diff --git a/telemetry_tempest_plugin/scenario/test_telemetry_integration.py b/telemetry_tempest_plugin/scenario/test_telemetry_integration.py
index 139e709..53a2a7f 100644
--- a/telemetry_tempest_plugin/scenario/test_telemetry_integration.py
+++ b/telemetry_tempest_plugin/scenario/test_telemetry_integration.py
@@ -31,7 +31,7 @@
     @classmethod
     def skip_checks(cls):
         super(TestTelemetryIntegration, cls).skip_checks()
-        for name in ["aodh_plugin", "gnocchi", "nova", "heat_plugin",
+        for name in ["aodh", "gnocchi", "nova", "heat_plugin",
                      "panko", "ceilometer", "glance"]:
             cls._check_service(name)