Add a bindep.txt file containing a cross-platform list
of dependencies needed for running included tox-based tests. Also
include a tox environment for convenience calling the bindep[*]
utility to list any missing system requirements.
This change is self-testing.
For bindep.txt see also
http://docs.openstack.org/infra/manual/drivers.html#package-requirements
[*] http://docs.openstack.org/infra/bindep/
Change-Id: I736a4e68ab376e64b5f5adf8406c396a631799ee