instack-undercloud is no longer in use by the TripleO project. Removing
the code to avoid confusion. Stable branches will continue to be
maintained for their life however no new features should be added.
Change-Id: I63a813c7c1ffd30ca30017133d31a497b77a9a4d
Blueprint: remove-instack-undercloud
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: I79e2aca1c61e4d1a36b82df447e0dc22fdad8cc3