Fix tests suite #170

Job	Run time
integration_test / jdk-11 mysql2	3m 2s
integration_test / jdk-11 mysql2	3m 2s
integration_test / jdk-11 mysql2	3m 2s
integration_test / jdk-11 postgresql	2m 40s
integration_test / jdk-11 postgresql	2m 40s
integration_test / jdk-11 postgresql	2m 40s
ci / jdk-11 travis	1m 26s
ci / jdk-11 travis	1m 26s
ci / jdk-11 travis	1m 26s
ci / verify	1m 32s
ci / verify	1m 32s
ci / verify	1m 32s
ci / jdk-11 travis	2s
ci / jdk-11 travis	2s
ci / jdk-11 travis	2s
ci / jdk-11 integration-mysql	1m 27s
ci / jdk-11 integration-mysql	1m 52s
ci / jdk-11 integration-mysql	2m 4s
ci / jdk-11 integration-postgresql	1m 26s
ci / jdk-11 integration-postgresql	1m 52s
ci / jdk-11 integration-postgresql	1m 54s
ci / jdk-17 travis	1m 26s
ci / jdk-17 travis	1m 19s
ci / jdk-17 travis	1m 19s
ci / jdk-17 integration-mysql	1m 26s
ci / jdk-17 integration-mysql	1m 36s
ci / jdk-17 integration-mysql	2m 10s
ci / jdk-17 integration-postgresql	1m 11s
ci / jdk-17 integration-postgresql	1m 52s
ci / jdk-17 integration-postgresql	1m 58s
	50m 58s

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