Stop false positive validation warning
Stop false positive validation warning

Per rhbz#1260776, deployments that didn't specify flavors per role (not
using --compute-flavor flags) would have a false warning about "nodes
with no profile that will not be used." This commit prevents that
warning from showing up when no flavor arguments are provided.

Change-Id: Id6b9dcd881f1b45e64022e9ad4ed13a3dd648674

openstack/python-tripleoclient