Add kafka python to monasca-agent virtualenv
Add kafka python to monasca-agent virtualenv

This will allow us to monitor kafka.

Change-Id: I64c2e335fa01ae26762290ee199c78d108a8035d

stackforge/monasca-api,sapcc/monasca-api,stackforge/monasca-api,stackforge/monasca-api,sapcc/monasca-api,openstack/monasca-api,sapcc/monasca-api,openstack/monasca-api,stackforge/monasca-api,openstack/monasca-api