Enable some off-by-default hacking rules
Enable some off-by-default hacking rules

This commit enables the following two hacking rules
which are disabled by default.

* H203 Use assertIs(Not)None to check for None
* H904 Delay string interpolations at logging calls

Recently we clean them up in our code base and
it looks better to detect them automatically.

Change-Id: I4fb81b1d8e29c21aecd909a54d3294362fe140a2

noironetworks/horizon,openstack/horizon,ChameleonCloud/horizon,ChameleonCloud/horizon,yeming233/horizon,yeming233/horizon,yeming233/horizon,NeCTAR-RC/horizon,ChameleonCloud/horizon,yeming233/horizon,openstack/horizon,noironetworks/horizon,BiznetGIO/horizon,noironetworks/horizon,ChameleonCloud/horizon,BiznetGIO/horizon,openstack/horizon,BiznetGIO/horizon,NeCTAR-RC/horizon,NeCTAR-RC/horizon,NeCTAR-RC/horizon,BiznetGIO/horizon,noironetworks/horizon,openstack/horizon