Add check for too_slow_to_test flag on swift notification test

This commit adds a missing check for the too_slow_to_test flag on the
swift notification scenario test. On stable icehouse, without the
performance improvements from juno, this test is basically a crapshoot.
Checking if the environment is capable of running this test reliably
needs to be ensured prior to running the test.

Change-Id: I1c69341bfbd9b7540ca9cacae32dbaef2c526f93
Partial-Bug: #1394774
diff --git a/tempest/scenario/test_swift_telemetry_middleware.py b/tempest/scenario/test_swift_telemetry_middleware.py
index e4b6cba..e8eb45c 100644
--- a/tempest/scenario/test_swift_telemetry_middleware.py
+++ b/tempest/scenario/test_swift_telemetry_middleware.py
@@ -51,6 +51,9 @@
             skip_msg = ("%s skipped as ceilometer is not available" %
                         cls.__name__)
             raise cls.skipException(skip_msg)
+        elif CONF.telemetry.too_slow_to_test:
+            skip_msg = "Ceilometer feature for fast work mysql is disabled"
+            raise cls.skipException(skip_msg)
         super(TestSwiftTelemetry, cls).resource_setup()
         cls.telemetry_client = cls.manager.telemetry_client