Revert "Revert "Revert "Revert "Revert "Disable rax-iad due to launch failure rate"""""
Revert "Revert "Revert "Revert "Revert "Disable rax-iad due to launch failure rate"""""

We have a new release of glean that fixes IPv4/IPv6 support for
rax-iad, we can finally bring the region back online.

This reverts commit 1f99d5fb70b42ee902e227d2e3ce2136b915f1ae.

Change-Id: I51ac60f758e74e7c13f7891a9ec57a43e05b1011
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config