add initial check for nova event in ceilometer

this patch adds the ability to query ceilometer events and includes
a check that nova events are recorded.

Change-Id: I5ae2aa700ddd0c89255e07fe2f188d7742eb6406
diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 9de7492..e9e5b2e 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -1092,6 +1092,16 @@
 #too_slow_to_test = true
 
 
+[telemetry-feature-enabled]
+
+#
+# From tempest.config
+#
+
+# Runs Ceilometer event-related tests (boolean value)
+#events = false
+
+
 [validation]
 
 #