JENKINS-26723 Expose displayName in Remote API

core/src/main/java/hudson/model/Run.java

@@ -748,6 +748,7 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
         return project.getFullDisplayName()+' '+getDisplayName();
     }
 
+    @Exported
     public String getDisplayName() {
         return displayName!=null ? displayName : "#"+number;
     }