Adding doc sections to tox.ini
Adding doc sections to tox.ini

This is based on the way keystone has their tox.ini set up.

Change-Id: Ic2ba7dd3de116ad6b5a16c205634e54da30d46ee

cloudkeep/barbican,openstack/barbican,cloudkeep/barbican,MCDong/barbican,jmvrbanac/barbican,MCDong/barbican,cneill/barbican,jmvrbanac/barbican,openstack/barbican,cneill/barbican