Fixed examples execution on Travis.

Author: Davide Schiera

.travis.yml

@@ -19,7 +19,8 @@ script:
 - examples/list_dashboards.py XXX
 - examples/list_hosts.py XXX
 - examples/list_metrics.py XXX
-- examples/post_event.py XXX "test event name" "test event description"
+- examples/post_event.py XXX "test event name" -d "test event description"
+- examples/post_event_simple.py XXX "test event name" "test event description"
 - examples/list_events.py XXX
 - examples/delete_event.py XXX
 - examples/print_data_retention_info.py XXX
@@ -43,7 +44,8 @@ script:
 - examples/list_dashboards.py XXX
 - examples/list_hosts.py XXX
 - examples/list_metrics.py XXX
-- examples/post_event.py XXX "test event name" "test event description"
+- examples/post_event.py XXX "test event name" -d "test event description"
+- examples/post_event_simple.py XXX "test event name" "test event description"
 - examples/list_events.py XXX
 - examples/delete_event.py XXX
 - examples/print_data_retention_info.py XXX