* fix bug: send task result to master until success.
* fix bug: send task result to master until success.
* add sleep
* set null if send result failed
* set null if send result failed
* change max length of username to 39
* test for gc
* change version to 1.3.0
* check and add some license files
* check and add some license files
* revert
Co-authored-by: baoliang <baoliang@analysys.com.cn>
