Reset assigned non-performing tasks (300,400-"200)

Initial action: Resets all assigned non-executed tasks

1. Delete/zktest/tasks/*

2. Modify all assigned non-executed task records

Node hangs: Monitor parent node (/zktest/nodes) will perceive, system delete node, callback Notifier

1. Traverse all assigned non-executed task records under Modify child nodes/zktest/tasks/${nodekey}/taskinst***

2, modify the corresponding database records

node re-connection: node re-connect callback will catch after modifying Zknodekey (old->new)

1. Traverse all assigned non-executed task records under old Zknodekey/zktest/tasks/${oldzknodekey}/taskinst***

2, modify the corresponding database records

Reset assigned non-performing tasks (300,400-"200)