[RDO][tripleo][kolla][puppet] Moving CentOS8 master dependencies repo in RDO

Hi,

In the next hours we are moving RDO to a new Dependencies repo for CentOS8 master based on new CBS (CentOS Build System) builds.

We have tested this new repo for all the projects that we know use it (kolla, packstack, puppet-openstck-integration and tripleo) and we have a plan to make the transition non-disrupting so we expect not to affect gates on any project by modifying [1] in several steps.

Let us know if you notice abnormal behavior so that we can fix any issue that may arise or even revert the change if needed.

Best regards,

Alfredo

[1] https://trunk.rdoproject.org/centos8-master/delorean-deps.repo