fix logic for close and closed MR

Author: YaraslauSupanitski

src/main/java/com/dabsquared/gitlabjenkins/trigger/handler/merge/MergeRequestHookTriggerHandlerFactory.java

@@ -38,6 +38,7 @@ public static MergeRequestHookTriggerHandler newMergeRequestHookTriggerHandler(b
             .acceptIf(triggerOnMergeRequest, of(State.opened, State.reopened), null)
             .acceptIf(triggerOnAcceptedMergeRequest, null, of(Action.merge))
             .acceptIf(triggerOnClosedMergeRequest, null, of(Action.close))
+            .acceptIf(triggerOnClosedMergeRequest, of(State.closed), null)
             .acceptIf(triggerOpenMergeRequest != TriggerOpenMergeRequest.never, of(State.updated), null)
         ;