Enable RavenDB storage

Author: ramonsmits

src/ServiceControl.Audit/App.config

@@ -20,8 +20,8 @@ These settings are only here so that we can debug ServiceControl while developin
     <!--<add key="ServiceControl.Audit/TransportType" value="SQLServer" />-->
 
     <!-- DEVS - Pick a persistence to run Auditing instance on. -->
-    <add key="ServiceControl.Audit/PersistenceType" value="InMemory" />
-    <!--<add key="ServiceControl.Audit/PersistenceType" value="RavenDB" />-->
+    <!-- <add key="ServiceControl.Audit/PersistenceType" value="InMemory" /> -->
+    <add key="ServiceControl.Audit/PersistenceType" value="RavenDB" />
   </appSettings>
   <connectionStrings>
     <!-- DEVS - Pick a transport connection string to match chosen transport above -->