Add support to list running jobs to zuul client

Change-Id: I16ccc02aa1a3b0cd8648b6ea05fc20c89c92a571
diff --git a/requirements.txt b/requirements.txt
index bb48290..1c5587b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,3 +16,5 @@
 apscheduler>=2.1.1,<3.0
 python-swiftclient>=1.6
 python-keystoneclient>=0.4.2
+PrettyTable>=0.6,<0.8
+babel