Split out SystemLoad alerts for Nova Compute nodes.

Fixes PROD-34626

Change-Id: If8198f27b013b680bf02743cba9fd91f2e477734
diff --git a/tests/test-requirements.txt b/tests/test-requirements.txt
index 0480052..bc7dc7f 100644
--- a/tests/test-requirements.txt
+++ b/tests/test-requirements.txt
@@ -1,3 +1,4 @@
 jsonschema
 reno
-setuptools<45.0.0
\ No newline at end of file
+setuptools<45.0.0
+msgpack<1.0.0