[CLOUDOPS-548] Allow retry on openstack HttpException
diff --git a/requirements.txt b/requirements.txt
index 140798f..c6a3ae4 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,3 +20,4 @@
 tooz # Apache-2.0
 sherlock>=0.4.1 # MIT
 kubernetes # Apache-2.0
+tenacity