force global attribute to be boolean

Author: ayasayadi1

api/utils/taskmanager.js

@@ -283,7 +283,7 @@ taskmanager.createTask = function(options, callback) {
     update.request = JSON.stringify(options.request || {});
     update.app_id = options.app_id || "";
     update.creator = options.creator;
-    update.global = options.global;
+    update.global = options.global || false;
     update.r_hour = options.r_hour || 0;
     update.autoRefresh = options.autoRefresh || false;
     update.report_name = options.report_name || "";