* Support real-time pod log collection
* datax task test have to mock ShellCommandExecutor with whole dependencies
* replace \n with EMPTY_STRING
* modify error log msg
* Update dolphinscheduler-task-plugin/dolphinscheduler-task-api/src/main/java/org/apache/dolphinscheduler/plugin/task/api/AbstractCommandExecutor.java
Co-authored-by: caishunfeng <caishunfeng2021@gmail.com>
* throw exception in pod log collection thread
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Co-authored-by: caishunfeng <caishunfeng2021@gmail.com>