fix typo in clientEngine option (#1095) #1349

Job	Run time
lint	1m 27s
fullstack_production_suite / test	6s
lint_markdown_files / lint	1m 5s
unit_tests (18)	2m 10s
unit_tests (20)	2m 4s
unit_tests (24)	1m 45s
integration_tests / test	10s
unit_tests (22)	2m 3s
Coveralls coverage	5s
	10m 55s

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