Updates python3.4 dependencies in docs
Updates python3.4 dependencies in docs

In order to run the unit tests within the python3.4 testing
environment. This patch adds those dependencies to the docs and
also specifies how to run the tests.

Change-Id: Ib6b7db0a20dfb38ed00a848fab8ff33a93365cdb

openstack/barbican,openstack/barbican