Updated Voltha_AlarmTests suite to refer voltha resource/keyword library

Change-Id: Iddbe2253915233c08eb23eb8473b71206f9f244c
diff --git a/tests/functional/Voltha_AlarmTests.robot b/tests/functional/Voltha_AlarmTests.robot
index 57ebf31..8973593 100755
--- a/tests/functional/Voltha_AlarmTests.robot
+++ b/tests/functional/Voltha_AlarmTests.robot
@@ -26,6 +26,7 @@
 Resource          ../../libraries/voltctl.robot
 Resource          ../../libraries/utils.robot
 Resource          ../../libraries/k8s.robot
+Resource          ../../libraries/voltha.robot
 Resource          ../../variables/variables.robot
 
 *** Variables ***