Support hypervisor diagnostics in client

Add diagnostics method in HypervisorManager

Change-Id: I95fe2a8eb26817a731de6e6df6132a49ef870ffb
Get diagnostics status of vms in a/all tenant

Support get diagnostics status of vms in current tenant
Support get diagnostics status of vms in a particular tenant
Support get diagnostics status of vms in all tenant

Change-Id: Ic46e83c6953ec9452fed7580627abfe38942e9cc
Add unassign, default, delete api for project-qos

Add extension api (unassign, default, delete) for resource
project qos

Change-Id: Id06b53523d508895ea363711cbabf3e6532dab50
Move host qos to hypervisor qos

1.Using hypervisor qos instead of host qos
2.Network qos setting refactored

Change-Id: Icde29ad39166ca1ebd1c5b4ea454a54c8b65914e