test: unflake ITDmlReturningTest #11096

Job	Run time
dependencies (17)	1m 18s
dependencies (17)	1m 18s
units (11)	3m 28s
units (11)	3m 28s
units (17)	3m 40s
units (17)	3m 40s
units (8)	3m 45s
units (8)	3m 50s
units (21)	3m 21s
units (21)	3m 21s
units-with-multiplexed-session (8)	3m 40s
units-with-multiplexed-session (8)	3m 40s
units-with-multiplexed-session (11)	3m 16s
units-with-multiplexed-session (11)	3m 16s
clirr	1m 20s
clirr	1m 20s
units-with-multiplexed-session (17)	3m 18s
units-with-multiplexed-session (17)	3m 18s
windows	8m 16s
windows	8m 16s
units-with-multiplexed-session (21)	3m 27s
units-with-multiplexed-session (21)	3m 27s
javadoc	2m 48s
javadoc	2m 48s
lint	1m 16s
lint	1m 16s
	1h 25m 51s

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