Fix: fix get_batch function calls. (#553) #1623

Job	Run time
dlrover-trainer-test	2m 34s
operator-test	2m 19s
dlrover-client-test	2m 52s
brain-test	2m 44s
dlrover-python-test	3m 41s
dlrover-system-test-criteo-deeprec	3m 36s
dlrover-system-test-deepfm	3m 40s
dlrover-system-test-tf2	2m 27s
pre-commit	1m 53s
atorch-pre-commit	4m 30s
atorch-python-test	7m 3s
tfplus-pre-commit	1m 4s
tfplus-python-test	1m 10s
	39m 33s

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