Remove tools/openstack*

Remove the tools/openstack* scripts - they're no longer maintained,
and there are several alternative documented ways to install openstack
with Heat now, so we should direct people to those instead.

Change-Id: I649f384f6acc3d7edab25f104f8e9d7e0050f2c1
Partial-Bug: #1182428
Merge "Remove tools/openstack*"