Revert "Temporarily reduce max-servers in rax-dfw"
Revert "Temporarily reduce max-servers in rax-dfw"

Do not approve until ticket 180130-ord-0000697 for
mirror01.dfw.rax.openstack.org is brought to a favorable conclusion.

This reverts commit 21463ce4ffcbccecd11b0f6360355cc694a6a7f1.

Change-Id: I35b8430af4b64d36a00a3d7ab7fa89567602eccb

openstack-infra/project-config,openstack-infra/project-config