Clustering ServiceControl

based on Calum's comments
No longer true.  The RavenDb license was  embedded  in 1.4.  The embedded license supports clustering.  https://github.com/Particular/ServiceControl/commit/7db35f37e92c2e949ac111003dc05826387934be#diff-3b85b57b632e77e66f8d39659d490a7a