[BUG] retire foreman.get_hosts_by_rack in Foreman library to rely on QUADS

[sadsfae]

With the inclusion of bcaa42b we can now rely on QUADS --rack and --uloc to populate the inventory in /dashboard inside of quads-web for racks, u-loc and blade considerations.

Also, moving to --uloc --rack and --blade will not actually work until we remove Foreman from supplying this.

https://github.com/redhat-performance/quads/blob/development/src/quads/web/blueprints/wiki.py#L170

Instead we need to find a cost-effective solution for gathering the other values we do need from Foreman like: MAC IP IPMIADDR IPMIURL IPMIMAC

If no Foreman is available simply display the things QUADS knows about in quads-web generated inventory like Workload Owner We might also consider some warning saying Foreman isn't available.

This change is actually needed for --rack and --uloc and --blade to function correctly.

This has the side benefit of letting complete sandbox testing occur with dummy data and no Foreman being available.

[sadsfae]

resolved with 6427bc9