Update Openstack plugins

 - Only implement plugin if aodh/gnocchiclient is available
 - Included in any missing licenses

Signed-off-by: Helena McGough <helena.mcgough@intel.com>
diff --git a/plugins/OpenStack/Aodh/notifier.py b/plugins/OpenStack/Aodh/notifier.py
index aa95215..3487daa 100644
--- a/plugins/OpenStack/Aodh/notifier.py
+++ b/plugins/OpenStack/Aodh/notifier.py
@@ -24,6 +24,12 @@
 import json
 import logging as log
 
+try:
+    import aodhclient
+except ImportError:
+    log.warn("Failed to import the aodhclient")
+
+
 from core.message_bus.producer import KafkaProducer
 
 from plugins.OpenStack.Aodh.alarming import Alarming
@@ -97,4 +103,5 @@
                         except Exception as exc:
                             log.warn("Failed to send notify response:%s", exc)
 
-register_notifier()
+if aodhclient:
+    register_notifier()