fix bug: Fix master task dependency check bug

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/runner/MasterExecThread.java

@@ -667,10 +667,12 @@ public class MasterExecThread implements Runnable {
         List<String> depNameList = taskNode.getDepList();
         for(String depsNode : depNameList ){
             if(!dag.containsNode(depsNode)
-                    || forbiddenTaskList.containsKey(depsNode)
-                    || skipTaskNodeList.containsKey(depsNode)){
+                    || forbiddenTaskList.containsKey(depsNode)){
                 continue;
             }
+            if(skipTaskNodeList.containsKey(depsNode)){
+                return DependResult.FAILED;
+            }
             // all the dependencies must be completed
             if(!completeTaskList.containsKey(depsNode)){
                 return DependResult.WAITING;