tox doesn't support local testing

[Boden R]

With the introduction tox sibilings with zuul v3 and removal of the install venv scripts, the local tox targets (pep8, py27, py3) don't properly setup the local env when running.

For example if you run "tox -py27" what gets installed is neutron 12.0.0 (as per requirements.txt), but what shoudl be installed is neutron/master.

To support proper testing envs locally (outside the zuul gate) a new target is needed that installs neutron from source.

For example we had to add a corresponding "-dev" tox target for each of these in vmware-nsx. EX: https://github.com/openstack/vmware-nsx/blob/master/tox.ini#L83

If tox doesn't support local testing its difficult to validate changes before submitting them, thus potentially wasting infra resources on simple issues that'd otherwise be caught in local testing.

[Boden R (boden)]

Please see http://lists.openstack.org/pipermail/openstack-dev/2018-June/131801.html

[Boden R (boden)]

I submitted [1] which should address this for master branch (only).

[1] https://review.openstack.org/#/c/578212/

[YAMAMOTO Takashi (yamamoto)]

https://review.openstack.org/#/c/604211/ has been merged

[OpenStack Infra (hudson-openstack)]

Change abandoned by boden (<email address hidden>) on branch: master
Review: https://review.openstack.org/578212
Reason: superceeded https://review.openstack.org/#/c/604211/