Fakes For Scheduler tests.
Bases: cinder.scheduler.host_manager.HostManager
host1: free_ram_mb=1024-512-512=0, free_disk_gb=1024-512-512=0 host2: free_ram_mb=2048-512=1536 free_disk_gb=2048-512=1536 host3: free_ram_mb=4096-1024=3072 free_disk_gb=4096-1024=3072 host4: free_ram_mb=8192 free_disk_gb=8192