Add python-cmd2 install for openstackclient.

Change-Id: I5cf6772c6fa1c813efa4993bd0461c45bbaae4ea
diff --git a/files/apts/general b/files/apts/general
index f04f955..971a5ff 100644
--- a/files/apts/general
+++ b/files/apts/general
@@ -18,3 +18,4 @@
 tcpdump
 euca2ools # only for testing client
 tar
+python-cmd2