don't perform first commit before all is initialized.

Author: jmd

src/DotJEM.Json.Index2.Management/IJsonIndexManager.cs

@@ -138,7 +138,8 @@ private void CaptureChange(IJsonDocumentSourceEvent sourceEvent)
             switch (sourceEvent)
             {
                 case JsonDocumentSourceDigestCompleted:
-                    writer.Commit();
+                    if(jsonDocumentSource.Initialized.Value)
+                        writer.Commit();
                     break;
                 case JsonDocumentCreated created:
                     writer.Create(created.Document);