Add a py35 tox venv for upcoming py35 support
Add a py35 tox venv for upcoming py35 support

Soon the gate jobs will support Python 3.5. This patch adds the
tox virtualenv in preparation for the move from 3.4 to 3.5.

Change-Id: Ifda38d02f97510f7687924e83b4c7b01c28bf10b

pombredanne/bandit,chair6/bandit,stackforge/bandit,pombredanne/bandit,stackforge/bandit