We Identified an issue with the Centos7 vagrant box that we were using
within Katello deploy that was preventing successful installations for
new users. To fix this we have pointed to a new box that is running
Centos 7.1 and is using a new box name. The next time you pull the
latest katello-deploy and vagrant up a centos7 box it will download the
new centos 7.1 image automatically and use that from now on.
-Justin