Revert "Temporarily remove tripleo-ci nodepool provider"

Approve when the tripleo-ci cloud is back on line and verified
responsive again.

This reverts commit e74d5cd9be78c7f3e276a267a20d8397c378f4d9
and updates the configuration to match the new deployment.

Change-Id: I2feabef819aa6698a5d623e4e65bf7673f913c51
Merge "Revert "Temporarily remove tripleo-ci nodepool provider""