
We assume that all groups are present in the inventory, and quite obtuse errors can result if any are not. This change adds a precheck that checks for the presence of all expected groups in the inventory for each service. It also introduces a common service-precheck role that we can use for other common prechecks. Change-Id: Ia0af1e7df4fff7f07cd6530e5b017db8fba530b3 Partially-Implements: blueprint improve-prechecks