Added hacking.py support to pep8 portion of tox

Usage: tox hacking
Once we have the source compliant we can merge this with the pep8 task.

There is a known problem with stevedore's dynamic module loading.

Change-Id: Ibfff87d85ecc81b1ce6dd994a135ab30b75d4d1e

tox.ini

@@ -21,12 +21,22 @@ commands = {toxinidir}/wrap_nosetests.sh --no-path-adjustment --with-coverage --
 
 [testenv:pep8]
 deps = pep8==1.3.3
-commands = pep8 --repeat --ignore=E125 --show-source ceilometer setup.py bin/ceilometer-agent-central bin/ceilometer-agent-compute bin/ceilometer-collector bin/ceilometer-api tests
+commands =
+    pep8 --repeat --ignore=E125 --show-source ceilometer setup.py bin/ceilometer-agent-central bin/ceilometer-agent-compute bin/ceilometer-collector bin/ceilometer-api tests
+
+[testenv:hacking]
+deps = pep8==1.3.3
+commands =
+    python tools/hacking.py --doctest
+    python tools/hacking.py --ignore=E12,E711,E721,E712,N403,N404 --show-source \
+        --exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg .
+    python tools/hacking.py --ignore=E12,E711,E721,E712,N403,N404 --show-source \
+        --filename=ceilometer* bin
 
 [testenv:venv]
 deps = -r{toxinidir}/tools/test-requires
        -r{toxinidir}/tools/pip-requires
-	   sphinxcontrib-httpdomain
+       sphinxcontrib-httpdomain
 commands = {posargs}
 
 [testenv:py26-folsom]