Put back the old non-parallelized nova boot path; option for future.
I won't get the Neutron lock bug solved in time for this eval churn, so for now, undo the path where we launch all the slaves via a single 'nova boot' call. This caused lockups in Neutron after N slaves had been created; cause unknown. Doing a call per VM probably isn't much slower in the long run, anyway.
master in 2 seconds (queued for 2 seconds)1 job for