Fix order of arguments in assertEqual

Related-Bug: 1277104

Change-Id: I61c8d81b18267d776d2abdc77b538dfe43e1c6dd
Enable pep8 on ./tools directory

This patch fixes the pep8 issues of the tool scripts and
configures tox to run pep8 on the tools directory.

Change-Id: Ifed21e19dd2b382790a1e2a90d5153a8845c4b64
Remove Python 2.6 classifier

Ceilometer does not support Python 2.6 anymore starting with Kilo and
might not work correctly with it, so remove the classifier.

Change-Id: I60ee148ff6565b201ee06745bb5d78e47603ef37
Merge "Enable pep8 on ./tools directory"
Merge "Fix order of arguments in assertEqual"
Merge "Remove Python 2.6 classifier"