Fix running multiple hubs in same cluster

[yuvipanda]

Cluster wide objects should be prefixed with the release name,
so we can have multiples hubs in the same cluster. For the
user-scheduler, this involves:

1. RBAC ClusterRoles & RoleBindings
2. Scheduler Name

[consideRatio]

Thanks this makes a lot of sense, we should support multiple hubs in different namespaces within the same cluster, even though we don't yet support multiple hubs in the same namespace.