Replace assertLessEqual - is not in py26 testtools

Fixes bug 1233513.

Change-Id: I22ba767739aa79fd6fdf75167b2573a27625e6d1
This script is not useful on a stable branch

This whitelist for havana will never be driven to zero. Running this
script on stable/havana makes it harder to use logstash to finish this
work on master.

Change-Id: I8b72f0006e32b8a91f71ecb2bf659df315cb3b46
Merge "Replace assertLessEqual - is not in py26 testtools" into stable/havana