
This PS attempts to make the Nova bootstrap job a little speedier. It's been noticed that flavor check/creation on initial deployment are rather slow, so this backgrounds the creation of each flavor, so that the defined flavors can be checked/create in parallel, rather than one at a time. Waits for the jobs to finish at the end. Change-Id: Ib9ab345e5aee697a41414e927910335dd286072f