demo script updates (#934)

Demo script updates.  Record-replay, a bugfix in the canary demo script, etc.

demos/record-replay/cleanup.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+fission fn delete --name hi-py
+fission route delete --name $(fission route list|grep hi|cut -f1 -d' ')
+fission recorder delete --name my-recorder
+kubectl -n fission delete pod redis-0