Make Multiple UACs possible

SippData now belongs to TestRunScenario, a join table more-or-less between TestRun and Scenario.
This allows each scenario to have multiple test runs, and each test run to have multiple scenarios
Make the CPS/concurrent graph a function

We'll only use the first UAC for now
Merge pull request #7 from wdrexler/feature/multi-uac

Make Multiple UACs possible