[FLINK-37100][tests] Fix `test_netty_shuffle_memory_control.sh` with … #1559

Job	Run time
Default (Java 8) / Compile	9m 37s
Pre-compile Checks / Basic QA	7m 19s
Default (Java 8) / Test packaging/licensing	35m 19s
Default (Java 8) / Test (module: core)	36m 48s
Default (Java 8) / E2E (group 1)	1h 48m 0s
Default (Java 8) / Test (module: python)	31m 50s
Default (Java 8) / E2E (group 2)	2h 15m 10s
Default (Java 8) / Test (module: table)	38m 41s
Default (Java 8) / Test (module: connect)	19m 46s
Default (Java 8) / Test (module: tests)	49m 30s
Default (Java 8) / Test (module: misc)	45m 34s
	8h 37m 34s

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