![Andreas Jaeger](/assets/img/avatar_default.png)
We do not need tox_install.sh, pip can handle constraints itself and install the project correctly. Thus update tox.ini and remove the now obsolete tools/tox_install.sh file. This follows https://review.openstack.org/#/c/508061 to remove tools/tox_install.sh. Change-Id: I11127d4cc7263ced57309952b71df1c7813f57d6