Exception when Files with some special characters are send to jobber-server by the runner

[michaelschnyder]

Originally reported from Jobbr < v1.0.0 before we made the component model refactoring, but this issue might still be in the source and therefore re-opening here

2016-04-12 14:01:34,375 [8] FATAL Unhandled Exception while processing request 'Method: POST, RequestUri: 'http://localhost/jobbr/client/jobRun/30982/artefacts', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
  Expect: 100-continue
  Host: localhost
  Content-Length: 445295
  Content-Type: multipart/form-data; boundary="55184c37-7c19-4e14-9d9a-00b4f16c3de4"
}' System.ArgumentException: Illegal characters in path.
   at System.IO.Path.CheckInvalidPathChars(String path, Boolean checkAdditional)
   at System.IO.Path.Combine(String path1, String path2)
   at Jobbr.Server.Common.FileSystemArtefactsStorageProvider.Save(String container, String fileName, Stream content)
   at Jobbr.Server.Web.Controller.ExecutorController.AddArtefacts(Int64 jobRunId)
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()
 ?.CallSite.Target 

First Screen shots actual working directory, where second screen shows the artefact content folder. The file with the name YYZ_-_Daily_Reports_(All)_2016-04-12_12-00-29-UTC.pdf is missing.