Passing cancellation token into the ScriptHost start call.

Author: fabiocav

src/WebJobs.Script/Description/CSharp/FunctionValueLoader.cs

@@ -10,7 +10,7 @@
 namespace Microsoft.Azure.WebJobs.Script.Description
 {
     /// <summary>
-    /// Lazily loads the function value, guaranteeing single execution, and exposing 
+    /// Lazily loads the function value, guaranteeing single execution, and exposing
     /// a <see cref="Task{MethodInfo}"/> value that completes when the provided
     /// factory completes the function creation.
     /// </summary>

src/WebJobs.Script/Host/ScriptHostManager.cs

@@ -81,7 +81,7 @@ public ScriptHost Instance
                     // write any function initialization errors to the log file
                     LogErrors(newInstance);
 
-                    newInstance.Start();
+                    newInstance.StartAsync(cancellationToken).Wait();
                     lock (_liveInstances)
                     {
                         _liveInstances.Add(newInstance);