Refactor: Rename EasyDL authors to DLRover authors.

[workingloong]

No description provided.

[codecov]

Codecov Report

Merging #702 (3169f88) into master (d4d1800) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #702   +/-   ##
=======================================
  Coverage   74.08%   74.08%           
=======================================
  Files         155      155           
  Lines       12658    12658           
=======================================
  Hits         9378     9378           
  Misses       3280     3280           

Files Changed	Coverage Δ
dlrover/python/tests/test_dataset_splitter.py	100.00% <ø> (ø)
dlrover/python/tests/test_dataset_task_manager.py	100.00% <ø> (ø)
dlrover/python/tests/test_elasticjob_scaler.py	100.00% <ø> (ø)
dlrover/python/tests/test_job_auto_scaler.py	100.00% <ø> (ø)
dlrover/python/tests/test_job_manager.py	100.00% <ø> (ø)
dlrover/python/tests/test_job_params.py	100.00% <ø> (ø)
dlrover/python/tests/test_k8s_watcher.py	100.00% <ø> (ø)
dlrover/python/tests/test_pod_scaler.py	100.00% <ø> (ø)
dlrover/python/tests/test_ps_manager.py	100.00% <ø> (ø)
dlrover/python/tests/test_ray_scaler.py	60.00% <ø> (ø)
... and 3 more

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