In Change-Id Ia3843818014f7c6c7526ef3aa9676bbddb8a85ca the 'host'
setting used for each of the fake compute hosts was accidentally named
'nhost' ('\nhost' was edited poorly), so the setting doesn't actually do
anything: you create multiple nova-compute processes they think they are
all on the same host and only one hypervisor and resource provider is
created.
With the correction in place, the wait_for_compute function needs to be
updated to be aware of the fact that the hostnames on the compute
services will have a numeric prefix when the fake virt driver is used.
Change-Id: I5e8430d170c0b1c4f195ebe510aff8be59e4a3bc
ac475bbb2a