Problem: test tx generation can't be run in parallel #6880

Job	Run time
integration_tests (unmarked)	9m 6s
integration_tests (ibc)	9m 36s
integration_tests (ibc_rly_evm)	7m 26s
integration_tests (ibc_rly_gas)	11m 47s
integration_tests (ibc_timeout)	5m 5s
integration_tests (ibc_update_client)	6m 46s
integration_tests (ica)	11m 52s
integration_tests (gov)	4m 7s
integration_tests (upgrade)	5m 40s
integration_tests (slow)	6m 30s
integration_tests (gas)	5m 15s
upload-cache	1s
	1h 23m 11s

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