buildbot - kernel diversity in host machines of latent workers

The current use of mainly debian based distros as the base of docker latent workers has created a common kernel for all distro builds.

This lack of diversity can miss imporant aspects of a user's workload. i.e. a Red Hat package user isn't going to use a debian kernel.

We need more variety of host based distros to ensure a test base that represents user workloads.

the lack of variety introduces major testing gaps for the same reasons as MDBF-321