Clear list of culprits when updating, not doing this lead to the same…

… developer being shown multiple times.

src/Soloplan.WhatsON.Jenkins.GUI/JenkinsStatusViewModel.cs

@@ -85,6 +85,7 @@ public override void Update(Status newStatus)
       }
 
       this.CommittedToThisBuild.Clear();
+      this.Culprits.Clear();
       foreach (var culprit in jenkinsStatus.Culprits)
       {
         var culpritModle = new JenkinsCulpritViewModel();