Revert "Turn off rax-ord"
Revert "Turn off rax-ord"

This reverts commit 0f9b5f8401464b250ea03d5af91385d9c777482b.

We've been running with ORD at a nominal 10 server max for over 24
hours, and see no recurrence of bug 1298006 for jobs run there after
their most recent cross-site circuit maintenance work. Go ahead and
throttle it back to full use again.

Change-Id: I7d3e3203cd20d69b4dd934383ced1fe4fc065fbf

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