In this tempest job, the mock datasource is used to create an entity
graph with ~20,000 vertices. This job will contain tests for
init procedure, processes, restarts, multiple api calls.
Other data sources are disabled. Heat, Telemetry, Mistral
are not installed.
This commit includes the first two tests, both using a template where
each action causes another action (three levels).
one test restarts vitrage-graph so the init procedure evaluates this template.
the other test does not restart. result should be the same.
Change-Id: I9c4c329983bbe5930de5484fa6932b318746ed5c