Restored support for initial databases

Src/DSInternals.DataStore/DomainController.cs

@@ -176,6 +176,9 @@
                     this.ServerReference = context.DistinguishedNameResolver.Resolve(this.ServerReferenceDNT.Value);
                 }
 
+                // The crossRefContainer does not exist in initial DBs, as it is created during dcpromo.
+                if (this.State != DatabaseState.Boot)
+                {
                     // Construct crossRefContainer DN (CN=Partitions,CN=Configuration,...)
                     var crossRefContainer = new DistinguishedName(CrossRefContainerRDN);
                     crossRefContainer.AddParent(this.ConfigurationNamingContext);
@@ -210,6 +213,7 @@
                     }
                 }
             }
+        }
 
         public int NTDSSettingsDNT
         {