adapt testcase so that all runs are created

VectoCore/VectoCoreTest/Integration/Declaration/EngineInputDataTests.cs

@@ -95,7 +95,7 @@ namespace TUGraz.VectoCore.Tests.Integration.Declaration
 			var inputDataProvider = xmlInputReader.CreateDeclaration(modified);
 			
 			var factory = new SimulatorFactory(ExecutionMode.Declaration, inputDataProvider, null, validate: false);
-			var first = factory.SimulationRuns().First();
+			var first = factory.SimulationRuns().ToArray().First();
 
 			var modData = ((ModalDataContainer)first.GetContainer().ModalData).Data;
 			first.Run();