Move Host QoS to hypervisor qos

Move host qos to hypervisor qos so that the endpoint will
using hypervisor id

Change-Id: I724ae2021dfe1063b5d9fb71d6dfa320e27b4398
Add response_key for hypervisor/tenant diagnostics

tenant_diagnostics#index -> "all_tenant_diagnostics"
tenant_diagnostics#show/status -> "tenant_diagnostics"
hypervisor_diagnostics#index -> "hypervisor-diagnostics"

Change-Id: I5553136369c20ffb1917279c47f68a93a4d65c12