Fix whole bunch of things

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Add backend for Single Host Load, Memory and Storage

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>
Add backend for Single Host Vcpu

Signed-off-by: Kirill Enykeev <enykeev@gmail.com>